MapReduce

Join us for a writing on the train trip to Lutherstadt Wittenberg (1hr 27m). Leave Berlin Hauptbahnhof at 10:40am, Platform 2 - B Arrive Lutherstadt Wittenberg Hbf at 12:07pm, Pl. 4 Once there we'll walk for a bit, find a cafe. We'll return on the train at 14:52 to Berlin, arriving at 16:19. Feel free to also read on the train.

A women-only, beginner-friendly trial session with the Panipuri Tribe. This session is for anyone who has been curious about Bharatanatyam but never knew where to start. No prior dance experience is needed — just an open mind and a willingness to move. Guided by Veda Siva, a classically trained Bharatanatyam dancer, we’ll explore the basics of this beautiful Indian classical art form in a calm, supportive, and welcoming space. Think gentle movement, rhythm, expression, and reconnecting with your body — without pressure or performance. 🪷 Slow-paced & accessible 🪷 Safe, inclusive space for women 🪷 Focus on movement, expression & mindfulness 📅 Monday, 6th April (Public holiday) 🕕 4:00 – 5:00 PM 📍Scharnweberstr 75 💛 €5 reservation (Limited spots) **Pay via PayPa**l: https://www.paypal.me/ssuhany — choose Friends & Family (please add your name in the note) to avoid extra charges *🌸 If you enjoy the session, regular weekly classes will follow.* ✨ Come as you are. Move gently. Discover the art of Bharatanatyam

Andere drücken die Schulbank, wir aber wollen in gemütlicher (und realer) Atmosphäre wieder aufeinandertreffen und einen Deutsch-Spanisch-Tandemkurs aufleben lassen. Beim einfachen Zusammenkommen und kennenlernen lässt es sich schließlich viel effektiver lernen. und Spaß haben. ...

Sprachenatelier in Berlin has a great variety of language courses available. There are flexible and effective German courses, online as well as in person. Areas such as conversation, grammar, vocabulary, listening and writing are taught in equal measure with qualified, experienced and dedicated German teachers. We offer intensive courses, part-time courses and also private lessons. If you do not have time during the day but you would still like to learn German, for example through enhancing your German language skills, then our evening courses are perfect for you. It is possible to learn online or in person. If you already have previous knowledge of German, we will carry out a written and oral assessment to find a suitable course for you. **Important!** If you participate in this event, you are not automatically registered for a course with us at Sprachenatelier. Firstly, you must go to our website and register there. You may begin a course after our placement test and depending on availability. (A new course starts every Monday). Intensive Course: [https://www.sprachenatelier-berlin.de/en/topic/3731.intensive-german-courses.html](https://www.sprachenatelier-berlin.de/en/topic/3731.intensive-german-courses.html) Evening Course: [https://www.sprachenatelier-berlin.de/en/topic/3732.evening-course-german-berlin.html](https://www.sprachenatelier-berlin.de/en/topic/3732.evening-course-german-berlin.html) Private Lesson: [https://www.sprachenatelier-berlin.de/en/topic/3733.private-lessons.html](https://www.sprachenatelier-berlin.de/en/topic/3733.private-lessons.html)

Come along, grab a coffee or cold drink, shut up, and write! We will do at least two sessions of each 45 minutes of writing and two breaks. We will start the first writing session at 19:15. **For space reasons, we are limited to a certain number of attendees, so please update your RSVP if you can't come**. If you are new, come and say hello, as we know that suddenly going quiet for 45 minutes and staring at that blank page can be intimidating when it's your first time. We have a lot of long-term regulars who will be happy to help you feel welcome. In between sessions, we have a Telegram chat: https://t.me/joinchat/ERW3pxD5kfELGeWs9SUhjw For more information, visit [https://shutupwrite.com](https://shutupwrite.com/).

-DROP IN - *(English below)* **Lindy Hop \| Swing Dance** Klassen (fast jeden Montag) 19:00 Uhr Starter 20:15 Uhr Improver / Refresher Für mehr Informationen & Kosten, bitte hier schauen: [SWING PATROL KOLLE 37](https://www.swingpatrolberlin.com/sp-kolle37.html) \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- Classes (almost) every Monday 19:00 Uhr Starter 20:15 Uhr Improver / Refresher For more information & cost, please look here: [SWING PATROL KOLLE 37](https://www.swingpatrolberlin.com/sp-kolle37.html)

Dear friends, Join us for a gentle hike if you enjoy both walking in the forest and meditating. We’ll take a 2-hour walk in Grunewald and have a meditation practice along the way. The practice is suitable for everyone, regardless of meditation experience. It’s a beautiful way to connect with nature, calm the mind, experience serenity, and have a good time with others. 📍**Meeting point:** [https://maps.app.goo.gl/gkvVTaZisA73RsRn7?g_st=ic](https://maps.app.goo.gl/gkvVTaZisA73RsRn7?g_st=ic) Please use this exact location - it’s a parking area next to Teufelsseestraße 21, 14055 Berlin. **🗓 When: Monday, 6 April** **10:00 - 13:00** Please arrive before 10:00. We will wait a maximum of 10 minutes for latecomers. The hike will take approximately 2 hours, and the meditation practice will last about 30 minutes. We will return to the starting point by 13:00. **🎟️Participation is donation based:** Feel free to donate any amount you like. **What to bring:** \- Wear comfortable shoes and clothes; please check the weather beforehand \- A water bottle \(water or tea\, as you prefer\) \- If you’d like\, bring something to sit on \(a small pillow\, cloth\, or anything comfortable for sitting in nature\) We love nature and meditation - and maybe you will too! Oneness Berlin Jazgul, Florian & Carla

We are back in the c-base! Do you already run NixOS and want to talk to other people or want an introductory session with some NixOS users. Just bring your machine! Usually there are no topics, we just sit in front of our computers, talk about stuff, debug some problems or review some PRs on nixpkgs. There are drinks usually available from the c-base bar. If you can't find us. just ask around or ask in irc (#krebs on hackint)

**WICHTIG!** Ab **17\. März** ziehen wir in die **Kurt‑Tucholsky‑Bibliothek** um: 📍 **Esmarchstraße 18, 10407 Berlin (Prenzlauer Berg)** Clubabende sind künftig **jeden 1. und 3. Dienstag** im Monat! Liebe/r Rhetorik-Interessierte/r: Dich erwarten vorbereitete Reden zu spannenden Themen und die Möglichkeit, mit einer Stegreifrede das Sprechen vor Publikum gleich auszuprobieren – das ist natürlich absolut freiwillig! Mit viel Spaß und Inspiration kannst du so unseren Club und das Toastmasters-Programm kennen lernen. Das Team der Toastmasters Berliner Redekünstler freut sich auf dich! Hinweis zur Teilnehmerzahl: Wir haben auch Anmeldungen über andere Plattformen und sind in der Regel mehr als 20 Personen. Die Veranstaltung ist auf Deutsch (The event is in German).

🚀 Workshops: The Human-Digital Synthesis **Kultur\-Technik 2026 \| Women in Big Data Berlin** AI is no longer a future concept—it is already reshaping how we work, create, and make decisions. The real question is: **how do we use it intelligently?** *Kultur-Technik 2026:* *The Human–Digital Synthesis* draws from the European idea that technology is an extension of human culture. In this interactive session, we bring together the Women in Big Data Berlin community to explore how humans and AI will collaborate, build, and evolve together. This is not a passive event— it’s a space to **learn, discuss, and create together.** The event is hosted by **Ojin AixHaus.** Ojin AixHaus is the new, collaborative community space in Berlin Mitte, where scientists, machine learning engineers, founders, creators, and AI enthusiasts come together to build and learn about the future of AI. Ojin AixHaus is free to join, open for startups in residency applications and is currently curating their 2026 events calendar. If you have a burning idea for an event, meetup or hackathon - bring your fire, they bring the space! **💡 Event Details 💡** **1\. Choose and Participate Your Workshop \(60 mins\)** Participants will get to choose and join one of two parallel tracks onsite, and co-create a “chapter” for the final showcase. 🧠 **TECH TRACK: Collective Intelligence & AI in Companies** Facilitator: Dr. Katarzyna Stoltmann Co\-Founder\, Women in Big Data Berlin \| Head of Data Science & AI How do companies truly get the best out of AI? The answer: **collective intelligence**. This session explores: * What collective intelligence means in practice * Which tasks and roles will evolve with AI * Whether AI replaces work—or creates new opportunities ✍🏼 Hands-on focus: Designing end-to-end AI solutions at scale—thinking through how humans and AI systems collaborate to deliver impact for millions of users. 🖼️ Output: A conceptual demonstration of a **“context-aware agent architecture”** 🌟 **IDENTITY TRACK: Visibility & Personal Branding in the Age of AI** Facilitator: Angeley Mullins Founder & CEO, Aetheris Ventures In a world where content and ideas can be generated at scale, how do you stay **visible, credible, and distinctive**? This session explores: * How to position your *human voice* in an AI-driven landscape * What defines authenticity and value in 2026 * How to use AI as a co-creator, not a replacement ✍🏼 Hands-on focus: Define your personal narrative, identify your unique “signal,” and build a strategic approach to visibility through guided exercises and peer exchange. 🖼️ Output: A **“Visible Self Prototype”**—your personal positioning, key content angles, and a simple plan to build credibility and presence in an AI-shaped world **2\. Grand Finale: The 2026 Showcase \(45 mins\)** We come together to share insights from each group: * Tech track presents the “Brain” (AI Agent concept) * Capabilities track presents the “Voice” (Personal Brand & Visibility Strategy in the AI era) We will have networking afterwards where you can continue sharing your ideas! 🗓 **Date: 9 April 2026** **⏰ Time: 18:00 – 21:30** **📍 Location: Ojin AixHaus \| Chausseestraße 36\, 10115 Berlin** Why do we need these workshops? Because AI is moving so fast! - and so should we. Join us to: * Understand AI beyond the hype * Learn how to use it strategically and responsibly * Connect with a community shaping the future 👉 **Choose your track. Join the conversation. Build what’s next. We look forward to seeing you next week!** Find out more here: [Ojin AixHaus Community ](https://ojin.ai/community) Follow Ojin AixHaus on socials: [Instagram](https://www.instagram.com/ojin.ai/#) [Linkedin](https://www.linkedin.com/showcase/ojin-aixhaus/) [X](https://x.com/Ojin_AI)

This is an [in-person communication lab](https://www.presentation-school.com/berlin-presentation-lab) that helps professionals speak clearly and confidently under pressure using proven methods. Most people don’t struggle because they don’t practice enough. They struggle because they practice without the right principles. This session focuses on deliberate, guided practice informed by performance psychology, neuroscience, and modern communication training. **What You Will Do** * Learn one science-based communication principle that improves real-world performance. * Train that principle in structured speaking exercises designed for skill development. * Receive clear, professional feedback you can apply immediately. Practice and feedback are guided by experienced communication professionals who work with executives and senior professionals. This is not peer-to-peer feedback or open discussion. **Who Should Attend?** * Non-native English speakers * Professionals who present, lead meetings, or speak up at work * Anyone who overthinks, freezes, or loses clarity under pressure * People who want structured improvement, not just repetition No prior experience is required. **What This is NOT** * A lecture. * A motivational talk. * A public performance. * Unstructured open practice. * Peer-led feedback or opinion-based critique. **Before The Session** Before the session, participants complete a short preparation form to clarify their goals and common communication challenges. This helps ensure the practice and feedback during the lab are as relevant and effective as possible. **Optional:** Participants may submit a short video (1–2 minutes) or written questions. This is optional and used to personalise focus areas and examples during the session. No individual coaching is provided. **After the Session** Participants receive a short follow-up pack with key takeaways, practical drills, a reflection question, and guidance on next steps. **Practical Information** Language: English Duration: 2 hours Format: In-person, structured group lab Address: Chausseestraße 86, 10115 Berlin Healthy snacks and water provided. Price: €25 per session If you are looking for a professional, practical way to improve how you communicate and want to train using principles that actually lead to results, this lab is a good place to start.

Liebe JUG-Mitglieder, wir möchten Euch herzlich zu unserem nächsten Stammtisch, der jeden ersten Dienstag im Monat stattfindet, einladen. Alles weitere kann im unserem Blog unter http://www.jug-berlin-brandenburg.de/ gefunden werden. Viele Grüße Sandra, Jan, Jörg und Oliver

Hi! Welcome to Thought Experiments in Pubs - Berlin edition, where you get to have deep conversations with people you've never met. The topic will be education. I'll post some questions that will help guide us through the topic as a comment on the day. **Location:** [Atopia Kaffeehaus, Prenzlauer Allee 187, 10405 Berlin](https://maps.app.goo.gl/Ukuup9CTrmedrB6f9) * Please consider that the locations we visit do not charge us for our booking, so in return, please make sure to show your appreciation by buying drinks or snacks. * If you're signed up but can't make the event, please cancel so someone else can take your spot * Make sure you check the right address, there is a sister pub nearby and it's not that one ☝️ **The idea:** A chance to meet and talk at a 'deeper' level, and skip the 'small talk'. **How will it work?** We will have a set of 'Thought Experiments', short, philosophical scenarios and questions, which will be discussed in groups. The conversation will flow freely, there are no strict rules, simply share and discuss your perspectives on the given topic. The thought experiments will be posted here ahead of the event. **Who should come?** Everyone! We believe that the more perspectives, the richer the conversation. This group is not about being experts in philosophy, it is about *doing* philosophy. That is, bringing our various life experiences and lenses on the world to group discussions about the human experience, the nature of reality... etc. **Do I need to bring anything?** No! Just an open, inquisitive mind. We will do 3 rounds of discussions. After the event, I would love to hear your feedback on the session. The thought experiments we will discuss are around the theme of the day. Prompts will be posted here on the day of the event. See you soon! \- Dirk *Thought Experiments in Pubs Berlin is inspired by [Thought Experiments in Pubs London](https://www.meetup.com/thought-experiments-in-pubs/), which originated in 2023 as a social experiment to get people together to connect at a deeper level. The copy on this page and original idea is derived from [Thought Experiments in Pubs London](https://www.meetup.com/thought-experiments-in-pubs/). For more info and to enquire about setting up your own group and joining the TEiP community, check out the [main TEiP website](https://www.alltogether.one/thoughtexperimentsinpubs) or contact Bonny: [bonnyastor@gmail.com](http://mailto:bonnyastor@gmail.com/)* [Buy Bonny a coffee](buymeacoffee.com/bonnyastor) as a thank you for keeping the community going and sharing the thought experiments with us. TEiP Berlin was started by Aino. Many thanks! I hope to keep it going just the same. [Photo generated with gencraft]

Back in August, we explored how Design Thinking can help us uncover and validate the right problems. But even when we agree on what to build, things often go wrong, not because of bad solutions, but because we don’t fully understand what the problem actually means in practice. In this session, we’ll build on that idea and focus on the next step: turning vague ideas into something concrete, shared, and testable. Using Example Mapping - a lightweight technique from Behaviour-Driven Development (BDD) - we’ll work in small groups to: * Break down a feature into rules, examples, and questions * Surface hidden assumptions and edge cases * Align on what the behaviour of a system should actually look like If the previous session was about finding the right problem, this one is about understanding it well enough to build it right. This is a hands-on workshop. Be prepared to participate fully and add to the energy of the room. Looking forward to seeing you there!

The Fellowship of the Star Schema: Transforming OLTP Data for Power BI One does not simply build reports on OLTP data. Join us on an epic journey from the depths of raw, normalized tables to the shining halls of a well-modeled star schema fit for Power BI greatness. We will demystify the differences between OLTP and OLAP, walk through star schema vs snowflake (and why Power BI has a clear favorite), and show you the compression differences between normalized and columnar storage that will make you never look at an OLTP model the same way again. We will cover the different types of dimensions, when to use them, and how to handle Slowly Changing Dimensions without losing your mind. You will leave knowing exactly how to identify a bad model, how to convert OLTP data into a clean star schema, and how to forge relationships that rule them all. Whether you are a data wizard, a curious hobbit, or somewhere in between, your models will never be the same.

Jimmy V's Grill & Pub in Grandview Heights. You are responsible for your own meal/drinks. We usually don't have any agenda other than eat, drink and talk. :) If the weather is nice we will be on the back patio, otherwise we are in the cigar room. This group has been meeting every Tuesday evening for over a decade. Many attendees do not RSVP on meetup. Please don't let the small number here discourage you. Anyone/everyone is welcome to come. We'd love to have you join us. COTA bus #5 comes to W. 5th and Wyandotte Rd. And it's a minute walk to the restaurant. *** Did you know that there are atheists everywhere?!?! You may not know it, but we are! We're in your schools, diners, police force, military, government, and some are even still in your churches! So come and join us and meet other local atheists, along with agnostics, heathens, humanists, skeptics, and anyone else who's 'hell bound'! Vision: a Central Ohio that accepts atheism as a viable alternative in all areas of public and private life. Mission: grow, support, and provide community for atheists in Central Ohio. Social meetings held most Tuesdays at a local pub/restaurant at 7:00 PM (and often into the wee hours). Attendees call themselves agnostics, skeptics, humanists, non-theists, deists or even theists. All attendees are welcome but should support our vision. Atheists of Columbus (AoC) is part of Omnipresent Atheists (OA). AoC members are invited to join this OA meetup and/or OA Facebook group ( https://www.facebook.com/groups/omnipresentatheists/ ) but are free to continue conversations on the AoC Facebook group ( https://www.facebook.com/groups/columbusatheists/ ). AoC was founded in 2012 as a networking, social group for Central Ohio area humanists, skeptics, atheists, agnostics, nonbelievers, freethinkers, and the curious. It was a member of Columbus CoR and held weekly meetings, mostly on Fridays, for several years but then operated as an online only group for some time. In November 2018, Omnipresent Atheists (OA), a group that routinely meets on Tuesdays, invited AoC to merge. Omnipresent Atheists is a member of the Columbus Coalition of Reason (ColumbusCoR.org). Omnipresent Atheists is a member of the Columbus Coalition of Reason ( http://www.ColumbusCoR.org ). Omnipresent Atheists endorses the mission of the Secular Coalition for America ( http://secular.org ).

**Important time note:** Please plan on arriving between 5:30 and 6:00 as the elevators lock after 6 and you'll need to message us and we'll need to come get you. The building address is 4450 Bridge Park The entrance is 6620 Mooney St, Suite 400 You will need to scan your ID at the door to get a visitor badge. **Abstract** GitHub Copilot is powerful, but what if you could scale from a solo AI assistant to an entire team of specialized agents working in parallel? This session introduces Squad: an open-source framework for multi-agent orchestration that lets you define teams of AI agents with specific roles, responsibilities, and expertise. We'll progress from Copilot basics to the Copilot CLI, explore how Agents add autonomy, and see how Instructions and Skills let you customize agent behavior. Then, the climax: a live demo where a Squad team of 3 agents (Lead, Developer, Tester) stands up and builds a working application in real-time, showcasing true multi-agent collaboration. Whether you're new to AI or exploring how to scale your use of Copilot, this session will show you what's possible when agents work as a team. **YouTube Link** TBD

Jimmy V's Grill & Pub in Grandview Heights. We meet in the bar in the room on the right (the cigar shop). You are responsible for your own meal/drinks. We usually don't have any agenda other than eat, drink and talk. :) If the weather is nice we will be on the back patio, otherwise we are in the cigar room. This group has been meeting every Tuesday evening for over a decade. Many attendees do not RSVP on meetup. Please don't let the small number here discourage you. Anyone/everyone is welcome to come. We'd love to have you join us. COTA bus #5 comes to W. 5th and Wyandotte Rd. And it's a minute walk to the restaurant. *** Did you know that there are atheists everywhere?!?! You may not know it, but we are! We're in your schools, diners, police force, military, government, and some are even still in your churches! So come and join us and meet other local atheists, along with agnostics, heathens, humanists, skeptics, and anyone else who's 'hell bound'! Vision: a Central Ohio that accepts atheism as a viable alternative in all areas of public and private life. Mission: grow, support, and provide community for atheists in Central Ohio. Social meetings held most Tuesdays at a local pub/restaurant at 7:00 PM (and often into the wee hours). Attendees call themselves agnostics, skeptics, humanists, non-theists, deists or even theists. All attendees are welcome but should support our vision. Atheists of Columbus (AoC) is part of Omnipresent Atheists (OA). AoC members are invited to join this OA meetup and/or OA Facebook group ( https://www.facebook.com/groups/omnipresentatheists/ ) but are free to continue conversations on the AoC Facebook group ( https://www.facebook.com/groups/columbusatheists/ ). AoC was founded in 2012 as a networking, social group for Central Ohio area humanists, skeptics, atheists, agnostics, nonbelievers, freethinkers, and the curious. It was a member of Columbus CoR and held weekly meetings, mostly on Fridays, for several years but then operated as an online only group for some time. In November 2018, Omnipresent Atheists (OA), a group that routinely meets on Tuesdays, invited AoC to merge. Omnipresent Atheists is a member of the Columbus Coalition of Reason (ColumbusCoR.org). Omnipresent Atheists is a member of the Columbus Coalition of Reason ( http://www.ColumbusCoR.org ). Omnipresent Atheists endorses the mission of the Secular Coalition for America ( http://secular.org ).

Pay attention! We’re delaying a week for those of you who may be on Spring break and/or celebrating the holiday. Ok, no pancakes, but waffles-a-plenty. Join the local UX and Digital Design community for a casual monthly breakfast. Look for us upstairs!

Jimmy V's Grill & Pub in Grandview Heights. You are responsible for your own meal/drinks. We usually don't have any agenda other than eat, drink and talk. :) If the weather is nice we will be on the back patio, otherwise we are in the cigar room. This group has been meeting every Tuesday evening for over a decade. Many attendees do not RSVP on meetup. Please don't let the small number here discourage you. Anyone/everyone is welcome to come. We'd love to have you join us. COTA bus #5 comes to W. 5th and Wyandotte Rd. And it's a minute walk to the restaurant. Did you know that there are atheists everywhere?!?! You may not know it, but we are! We're in your schools, diners, police force, military, government, and some are even still in your churches! So come and join us and meet other local atheists, along with agnostics, heathens, humanists, skeptics, and anyone else who's 'hell bound'! Vision: a Central Ohio that accepts atheism as a viable alternative in all areas of public and private life. Mission: grow, support, and provide community for atheists in Central Ohio. Social meetings held most Tuesdays at a local pub/restaurant at 7:00 PM (and often into the wee hours). Attendees call themselves agnostics, skeptics, humanists, non-theists, deists or even theists. All attendees are welcome but should support our vision. Atheists of Columbus (AoC) is part of Omnipresent Atheists (OA). AoC members are invited to join this OA meetup and/or OA Facebook group ( https://www.facebook.com/groups/omnipresentatheists/ ) but are free to continue conversations on the AoC Facebook group ( https://www.facebook.com/groups/columbusatheists/ ). AoC was founded in 2012 as a networking, social group for Central Ohio area humanists, skeptics, atheists, agnostics, nonbelievers, freethinkers, and the curious. It was a member of Columbus CoR and held weekly meetings, mostly on Fridays, for several years but then operated as an online only group for some time. In November 2018, Omnipresent Atheists (OA), a group that routinely meets on Tuesdays, invited AoC to merge. Omnipresent Atheists is a member of the Columbus Coalition of Reason (ColumbusCoR.org). Omnipresent Atheists is a member of the Columbus Coalition of Reason ( http://www.ColumbusCoR.org ). Omnipresent Atheists endorses the mission of the Secular Coalition for America ( http://secular.org ). This group has been meeting every Tuesday evening for over a decade. Many attendees do not RSVP on meetup. Please don't let the small number here discourage you. Anyone/everyone is welcome to come. We'd love to have you join us.

AI is changing how art is made. But when does it stop being your work and start being the machine’s? This month we're going to be doing a panel with with digital image, music, and written word artists, talking about at what point, while using AI in the creation process, does the work become not the artist creation? We encourage audience participation during this event that will be moderated by Chris Slee. Whether you’re deep in the field or just getting curious, come connect with others building and exploring AI in Columbus. Sponsored by [Transform Labs](https://www.transformlabs.com/services)