Graph Theory

During this hike, we’ll take a look at what has changed over the winter (in case you joined us on this hike last year on 3 October). As in autumn, we will meet at Friedrichshagen S-Bahn station (on the platform, east exit) and start the event with an ice cream from a famous ice cream place on Bölschestraße. Then we will hike through the Erpetal, across woods and fields, into the outer districts of Berlin (https://www.komoot.com/tour/2936165603). If you don't like ice cream, please arrive at the S-Bahn station Friedrichshagen at 13:30 am instead. We will pick you up at the corner of Fürstenwalder Damm and Dahlwitzer Landstraße. To the north-east of the station, there is an area with benches and a toilet. On Google Maps, the toilet is indicated as 'Berliner Toilette S-Bahn'. We will pick you up at this spot. If you need to contact other participants during the hike (for example, to find out where to meet us if you are running late), please use the Signal group link that I will send to all participants via private message three hours before the hike. This timing is intended to prevent non-participants from misusing the link for unwanted advertising, which has happened in the past. Signal allows us to share our locations during the hike without involuntarily forwarding this information to the intelligence services of authoritarian or non-authoritarian states, but unfortunately the location sharing function does not include tracking, i.e. no continuous updates. For all other purposes, especially socialising and posting photos, please use the Telegram subgroup 'Event Chat & Photos': https://t.me/addlist/KAOk2PA4BDE0ZTY8 . The hike will take place if at least 6 people sign up. As long as there are more than 6 people, you can sign up and cancel as many times as you like. If there are 6 or less people, please avoid cancelling, as this might make the other participants feel insecure about whether the hike will take place (or whether there is something wrong with the hike and they should cancel as well --> Matthew effect - Wikipedia). If there are less than 6 participants, the hike will also take place unless the majority of the participants are in favor of canceling the hike.

Apologies everyone for the completely skipped date on Easter! The emails from MeetUp were going straight to spam, so I was convinced there was no interest. For those of you still interested, I would suggest that Sunday, May 10 would be a good replacement date to kick things off. Content-wise, the event would stay the same. Meeting place would be the Schoenbrunn Biergarten Kiosk in Volkspark Friedrichshain. This would also be the first opportunity to discuss alternative times and locations. \-\-\- The first chapter of To Our Friends! A great intro to the style of writing and the fast and furious manner of argumentation from the radical theory collective. Selection for discussion: "Merry Crisis and Happy New Fear" Link to the text: https://theanarchistlibrary.org/library/the-invisible-committe-to-our-friends

This year we have our very own big covered tent on the silent green lawn from 13–15h on Sunday May 10. To gather, chat with each other and have a nice day together! It’s public open day, completely free APART FROM THE SCREENINGS, WHICH COST 6€/hourlong screening (not related to our group of course) There’s a character art market, an art exhibition, collage workshop, picture book readings, and 6 screenings plus a Kids Kino.

**If the event is fully booked, feel free to message me or join us at the meeting point in case spots open up.** 🇬🇧 Discover Berlin’s industrial architecture on our 2-hour photo walk through **Schöneweide**! Explore old factory halls, workshops, turbine halls, and hidden courtyards – capturing both the architecture and its story. Bring your camera or smartphone and develop your own perspective on urban spaces. No experience needed – we’ll experiment together with angles, light, and composition. **Date:** May 10, 2026 **Time:** 12:00 – 14:00 **Meeting Point:** Platz am Kaisersteg **Participation & Contribution:** Everyone is welcome to join. I appreciate a voluntary donation to support future workshops and photo walks. Suggested contribution: €5–15, any support is welcome! **Suggested contribution:** €10 (optional) **Route & Highlights (2 hours):** * Industriesalon Schöneweide – old factory halls * Former turbine halls & workshops – industrial details * Courtyards with brick facades – small structures & textures * Photo breaks with short explanations about construction phases & materials **Focus:** Industrial architecture, light, composition, and personal perspective **About Me:** Hi, I’m Julia ([@worldflaneur](https://www.instagram.com/worldflaneur)). With a background in architecture and photo editing, I help participants see and photograph urban spaces in new ways—capturing not just buildings, but the stories they tell. 🇩🇪 Entdecke die Industriearchitektur Berlins auf unserem 2-stündigen Foto-Walk durch **Schöneweide**! Wir erkunden alte Fabrikhallen, Werkstätten, Turbinenhallen und versteckte Hinterhöfe – und halten sowohl die Architektur als auch ihre Geschichte fotografisch fest. Bring deine Kamera oder dein Smartphone und entwickle deinen eigenen Blick auf urbane Räume. Keine Vorerfahrung nötig – wir experimentieren gemeinsam mit Perspektiven, Licht und Komposition. **Datum:** 10\. Mai 2026 **Zeit:** 12:00 – 14:00 Uhr **Treffpunkt:** Platz am Kaisersteg **Teilnahme & Beitrag:** Die Teilnahme ist offen für alle. Wer möchte, kann die Walks mit einer freiwilligen Spende (5–15 €) unterstützen. Alles ist willkommen! **Empfohlener Beitrag:** 10 € (optional) **Route & Highlights (2 Stunden):** * Industriesalon Schöneweide – alte Fabrikhallen * Ehemalige Turbinenhallen & Werkstätten – industrielle Details * Hinterhöfe mit Backsteinfassaden – kleine Strukturen & Architektur * Fotopausen mit kurzen Erklärungen zu Bauphasen & Materialien **Fokus:** Industriearchitektur, Licht, Komposition & persönliche Perspektive **Über mich:** Hi, ich bin Julia ([@worldflaneur)](https://www.instagram.com/worldflaneur). Mit Hintergrund in Architektur und Bildredaktion zeige ich, wie man urbane Räume auf neue Weise sieht und fotografiert – nicht nur Gebäude, sondern auch die Geschichten, die sie erzählen.

**"I swear it's a sport! 🏸"** Let’s meet, play, and have fun! Our motto: **Sweet & Sweat!** ⚠️ **CRITICAL: RSVP & CONFIRMATION** * **First-Timers:** If it's your first time joining us, I will send you a **Direct Message** to confirm your attendance. **Please reply by Friday 1:00 PM**, or your spot will be released to the waiting list. * **Stay Alert:** Check your Meetup messages and comments regularly if you are on the main or waiting list. * **Update RSVP:** Sign out immediately if you can’t make it (even from the waiting list). * **Safety**: By registering, you acknowledge that you are participating at your own risk, and will be considerate for other players safety. *** 💰 **HOW TO JOIN & PAY** **Option 1: PayPal (€12)** 1. Sign up for the event. 2. **When to pay:** You can pay **immediately** upon signup or anytime **until Saturday evening**. 3. Link: [https://paypal.me/berlinhorizon](https://paypal.me/berlinhorizon) (**Use "Friends & Family" only!**) - Indicate your name and the event date please ! * *Note:* If you are on the **Waiting List**, do NOT pay until you are officially moved to the Main List. **Option 2: Cash (€12)** 1. Reply **'Cash'** to the RSVP question when signing up. 2. Pay in cash **on arrival** (Exact change only, please!). **Refund & Cancellation Policy:** * Guaranteed refund if you cancel **before Friday 1:00 PM** (48h notice). * Late cancellations (after Friday 1 PM) will still be required to pay. *** 🕒 **THE SCHEDULE** * **13:00:** Meet inside for introductions and registration. * **13:15:** Official court time starts *(some courts may open at 13:00 depending on availability, so **please be punctual** to maximize playtime!).* * **14:45:** End of play. * 🎁 **Bonus:** Your 10th session is **FREE**! (Paid upfront, then refunded later). *** 📍 **FACILITY & GEAR** **Location:** TiB 1848 e.V, Columbiadamm 111 (Near Tempelhofer Feld). **Equipment:** * *Racket*: Bring your own or rent one for €2. * *Shoes*: Must be **non-marking**, light-soled, and **never worn outside**. (Rental available for €2). * *Amenities*: Showers and lockers available. Sauna access depends on the club’s discretion. **Last but not least:** No worries about level, we play for fun above all! Looking forward to seeing you on the court! :)

Let's meet for the [ACX Spring Meetups Everywhere 2026](https://www.astralcodexten.com/p/meetups-everywhere-spring-2026-times) in the Humboldthain! This will likely be a big meetup, as it was announced by Scott on ACX. From experience, I expect 25–50 attendees. Humboldthain is good to reach by public transport; the next train stops are S+U Gesundbrunnen and S Humboldthain. If you’re reading this, you’re invited. Please don’t feel like you "won't be welcome" just because you’re new to the blog, demographically different from the average reader, or hate ACX and everything it stands for. You'll be fine! I'll buy some snacks; feel free to bring something to share as well. There are also many restaurants around if you get hungry. Location: Big lawn at the center of Humboldthain — [https://plus.codes/9F4MG9WP+36](https://plus.codes/9F4MG9WP+36) Contact: Reply to this event, message me here on Meetup, or join the Telegram group below. Next public toilet: [https://g.co/kgs/bp9nGd](https://g.co/kgs/bp9nGd) Group Link: [https://t.me/+tVWSc66-0UM5MzA6](https://t.me/+tVWSc66-0UM5MzA6)

We meet and sketch each other in Berlin. This is just an art gym that we also exercise our social skills. Afterwards usually we go for lunch as a group. **How Does It Work?** This event is simple, we meet and sketch each other doing portraits. Most of the participants use pencils or watercolors. Main aim is to socialize while we draw. There will be plenty of time to talk and get to know each other. We have to mention that this event is suitable for all levels. Many have started to draw in our event actually. **Structure** A. Warmup Phase: We pose to each other for 1 minute. B. Main Phase: We pose to each other for 10 minutes. C. Showcase Phase: We show some of the drawings we did to each other. **Who We Are** Creative Sessions is an art events group located in Berlin. **Is it Free?** The event is free of charge. It is advisable to get a drink though. This is a cafe, we need to have at least half of the people on each table with a drink. They accept only cash and most hot drinks cost from 2.50 to 3.50. **How to help or donate?** The event is provided for free but many people help this be a regular thing. We also need people to volunteer and help for minor tasks like the serving of the drinks or cleaning up. Just send us a message. If you want to donate and keep this event from happening, via Paypal to the host (Miltos) : https://ko-fi.com/miltosthings/ **Art Materials?** Bring your own art materials. **Our Instagram Profile** Follow us on instagram @icreativesessions Use the hashtag #icreativesessions on your post description there to find out drawings from the event!

Chitta Walks is for people whose days move fast, while the mind never fully lands. Thoughts keep looping even when nothing is urgent. The body moves, but attention is elsewhere. Over time, this disconnect drains clarity and ease. This walk is a simple reset. We meet in Berlin’s Tiergarten and walk at a gentle pace. Parts of the walk are in silence, with light guidance and a few short prompts. The walk itself is the practice, bringing body and mind back into the same moment. No apps. No performance. Just a clear space to slow down and notice what is happening. If you want to slow down without withdrawing from life, join a Chitta Walk. ✨ **What to expect (approx. 90 minutes):** * A short arrival and orientation * A guided silent walk (phones off, no conversation) * One concise science-based impulse on attention or stress * Optional reflection in pairs or small groups * A simple takeaway or experiment for daily life 🚶**Who this is for:** * Professionals, creatives, and people in transition. * People who feel mentally busy and want more clarity and balance. * Those curious about mindfulness, but grounded and practical. * Anyone comfortable with silence and gentle self observation. 🔔 **Practical notes:** * Duration: 60-90 minutes * Wear comfortable shoes and weather-appropriate clothing * No prior experience needed * Group size is limited to keep the space quiet and focused 🧭 **Facilitator:** My name is Partha Sarathi, you can call me PS. I have lived in Berlin for over 12 years. With a background in physics and materials science, my interest in mindfulness grew through personal experience with stress and health challenges. I facilitate the space and structure of the walk, inviting shared exploration rather than instruction. 🤔 **Why Chitta Walks?** Chitta is a Sanskrit word referring to the mind or field of awareness, used here in a practical, non-religious sense. Chitta Walks is about noticing how the mind works by slowing down and walking together. Mindful walking makes thought patterns visible in real time, while moving and sensing in the world. The name points to a simple capacity: noticing what is happening in the mind without immediately trying to fix, judge, or optimize it. 🌿 **Possible effects:** A calmer nervous system. Clearer attention. A felt sense of being more present in your body. Subtle insights into how your mind reacts under everyday conditions. A quieter, more grounded way of moving through the city. **Come as you are. Walk. Notice. Leave with a little more space inside.**

On every 2nd Sunday of a month we meet in a greater crowd. It's a good opportunity to meet new members & to catch up with the old members. Location: nearby Hauptbahnhof \- Beergarden Edition \- no attendee limit \- don't forget to bring sun protection \- we usually sit in the backyard behind the food court\. I will post the exact location when we arrived

Have you always wanted to learn bouldering but never had the right company? Or are you an experienced boulderer who just wants to find boulder-buddies? If yes, this is the right event for you. We are going to meet inside "urban apes Basement Boulderstudio", close to S Anhalter Bahnhof, also not far from Potsdamer Platz. If you have never been there, you will need to sign up with them, which will take a bit of time. After that, **you can find us on the couches near the lockers (not in front of the reception), next to a red smiley**. When you enter the actual gym, enter the hall by turning left immediately - you are walking towards them. We will start warming up around 11:10, so everyone has enough time to arrive and get changed before that. ***\*\*\**** *Spots are limited, so please update your RSVP at least 24 hours in advance if you won't be joining. **NO-SHOWs ARE NOT COOL \*\*\**** We enter the gym at 11:00, if you are late, you will need to look for us inside. IMPORTANT: they only accept cards as a payment method. No cash. One day ticket will cost you 13,90 EUR (10,90 EUR if you are a student, free if Urban Sports Club). **What to bring: well, first of all, a good mood.** But you could also bring * climbing shoes if you have any. If not, you can rent them there, no worries. They cost 3,50 EUR. * a lock (for the locker). * chalk. You won't need that if you are a beginner. Renting is possible. * water. * extra clothes. It's quite chalky there and humans sweat, not the best mix, don't you think? :D Please, note: the organizer is not responsible for anything, including injuries. A basic introduction will be provided.

Welcome to Sunday Tech Coffee. This is a **networking** event for those in the tech industry in Berlin. Table 5d

**Looking for a fun, social outdoor sport in Berlin this summer?** Join us to get to know Strandvölkerball - a German twist on dodgeball played on sand! **🏐 What is Strandvölkerball** Strandvölkerball is a **German version of dodgeball played on sand**, combining quick reflexes, teamwork, and a lot of laughs. No experience needed! Most people who join are beginners or haven't played since school. Our ball is very soft! **📍Central Berlin Location** We play **weekly games right next to the East Side Gallery** **in Friedrichshain**, one of the most iconic spots in Berlin. It's the perfect setting for enjoying summer evenings, moving in the sand, and meeting new people. You also have a great view of the beautiful Oberbaumbrücke. **🌞 Weekly Social Games - All Levels Welcome** * **Mixed games every week during the summer** * Focused on **fun, movement, and community** * **Beginner-friendly** – easy to learn, no pressure * Come solo or bring friends! * **Check back on the day of the event** \- sometimes we have to cancel due to **heat, storm, or lack of participants** During the season, some of our training sessions may be reserved for tournament preparation. **🏆 Friendly Tournaments & Special Events** We also host occasional **tournaments**, which are still focused on **fun and inclusive competition**. To join a tournament, you should visit at least some of our social games to learn the rules. Please read the tournament descriptions carefully. 🔥 **Season Highlight: The StrandVÖLKERball-WM** Our biggest event is the **StrandVÖLKERball-WM**, a multi-day festival with: * Teams from all over Germany * Great music, good vibes, and lots of high-quality Strandvölkerball games * Open participation, attend a few trainings, and you'll likely find a team * Want to start your own team? Awesome! Register at: [strandvoelkerball.de/wm-landing/](https://strandvoelkerball.de/wm-landing/) **If you have any questions, please don't hesitate to contact us or check our [Website](https://strandvoelkerball.de/).** We can help you with everything, from joining your first social game to finding a team for one of the tournaments. \-\-\- **Auf der Suche nach einem unterhaltsamen, geselligen Outdoor-Sport in Berlin diesen Sommer?** Komm zu uns und lerne Strandvölkerball kennen – eine deutsche Variante von Völkerball, die im Sand gespielt wird! **🏐 Was ist Strandvölkerball** Strandvölkerball ist eine deutsche **Variante von Völkerball, die im Sand gespielt wird** und schnelle Reflexe, Teamwork und jede Menge Spaß vereint. Keine Vorkenntnisse erforderlich! Die meisten Teilnehmer sind Anfänger oder haben seit ihrer Schulzeit nicht mehr gespielt. Unser Ball ist sehr weich! **📍Mitten in Berlin** Wir spielen wöchentlich **direkt neben der East Side Gallery in Friedrichshain**, einem der bekanntesten Orte Berlins. Es ist der perfekte Ort, um Sommerabende zu genießen, sich im Sand zu bewegen und neue Leute kennenzulernen. Außerdem hat man einen tollen Blick auf die schöne Oberbaumbrücke. **🌞 Wöchentliche Community Games - Alle Spielstärken willkommen** * **Jede Woche im Sommer gemischte Spiele** * **Spaß, Bewegung und Gemeinschaft** stehen im Vordergrund * **Anfängerfreundlich –** leicht zu lernen, kein Druck * Komm alleine oder bring Freunde mit! * **Schau am Tag der Veranstaltung noch einmal vorbei** – manchmal müssen wir aufgrund von **Hitze, Sturm oder zu wenigen Teilnehmern** absagen. Während der Saison können einige unserer Trainingseinheiten für die Turniervorbereitung reserviert sein. **🏆 Freundschaftsturniere & Sonderveranstaltungen** Wir veranstalten auch gelegentlich **Turniere**, bei denen der **Spaß und der integrative Wettkampf** im Vordergrund stehen. Um an einem Turnier teilzunehmen, sollten Sie mindestens einige unserer Community Games besuchen, um die Regeln zu lernen. Bitte lesen Sie die Turnierbeschreibungen sorgfältig durch. 🔥 **Saison-Highlight: Die StrandVÖLKERball-WM** Unser größtes Event ist die **StrandVÖLKERball-WM**, ein mehrtägiges Turnier mit: * Teams aus ganz Deutschland * Toller Musik, guter Stimmung und vielen hochkarätigen Strandvölkerball-Spielen * Offene Teilnahme – Nimm an ein paar Trainingseinheiten teil und du wirst mit Sicherheit ein Team finden! * Möchten Du dein eigenes Team gründen? Super! Registrier dich unter: [strandvoelkerball.de/wm-landing/](https://strandvoelkerball.de/wm-landing/) **Wenn Du Fragen hast, zöger bitte nicht, uns zu kontaktieren oder unsere [Website](https://strandvoelkerball.de/) zu besuchen.** Wir helfen dir gerne weiter, vom ersten Community Game bis hin zur Suche nach einem Team für eines der Turniere.

**Total Eclipse of the Chart: School Redistricting Dashboards** In this presentation, we will explore the utilization of maps, sets, and SQL within a Tableau dashboard to help provide “what-if” analyses generated through the use of a mapped dashboard, providing different scenarios and the potential implications of these. While in this use case we are focused on a large school district, the concepts of utilizing existing data to explore the future impacts of modifying different geographic boundaries can be useful to many industries, balancing the mix of maps with visual analytics. **About Our Speaker** Robert Kramer is the Data Systems and State Reporting Coordinator at South Western City Schools in Grove City. He has worked there for 17 years, serving previously in the roles of Data Analyst, Programmer, and Operations Coordinator. Prior to working at South Western, he worked as a Systems Engineer at Pinnacle Data Systems in Groveport. He graduated in 2005 from The University of Toledo with his Bachelor’s in Computer Science and Engineering, and a minor in Mathematics. Robert resides in Obetz with his wife, and their 15 and 12 year-old daughters. He was also just elected to his 3rd four-year term on the Obetz City Council. Thanks to our 2026 sponsors: [Clarivoy](https://www.clarivoy.com), [What Box Consulting Group](https://www.whatboxconsultinggroup.com), [Conductrics](https://www.conductrics.com), and [Piwik PRO](https://piwik.pro) More info at [cbusdaw.com](https://cbusdaw.com)

Join us as we get together to see the top-reviewed comedy-drama, I LOVE BOOSTERS! The film comes from writer/director Boots Riley and follows a group of shoplifters who take aim at a cutthroat fashion maven. Here are details, trailers and our plan for this event: DESCRIPTION: The film follows a group of shoplifters who take aim at a cutthroat fashion maven. It is written/directed by Boots Riley (Sorry to Bother You) and stars Keke Palmer, Naomi Ackie, Taylour Paige, Poppy Liu, Eiza González, LaKeith Stanfield, Will Poulter, Don Cheadle, and Demi Moore. BUZZ AND ACCLAIM: I Love Boosters was the opening film at this year’s SXSW Festival and premiered to rave reviews! It is currently earning a tremendous 97% positive rating on Rotten Tomatoes where critics call it, “an unexpected celebration of friendship, community, and solidarity.” Others call the film “an exercise in radical empathy,” a “masterful” and “optimistic” film designed to “provoke discussion” while making the audience laugh. TRAILER: [https://www.youtube.com/watch?v=r4lPRISgr9c](https://www.youtube.com/watch?v=r4lPRISgr9c) SUMMER OF ICE CREAM: GRAETER’S! Established way back in 1870 in Cincinnati, this historic, family-owned brand is famous for their delicious small batch ice cream and any chocolate chunk flavors! They are currently the only commercial ice cream maker using the French Pot method that they’ve been using since they first opened! Plus, those chocolate chunks, oh my goodness! Vegan options are available. PLAN: We’ll plan for a 7pm-ish showing and will meet in the lobby area about 20 minutes before the show. Advance ticket purchase not required for this theater but Showtime and complete details will be confirmed/announced as the date gets closer. Look forward to seeing you there, Dan

Join us as we get together to get together to help those in need at this CMG Gives Back event! We have a great little community of Movie Group friends so rather than see a movie this time, we’ll help “create a better world” by helping serve those in need. Here are complete details and our plan for this event: FAITH MISSION – GRANT KITCHEN: The Faith Mission kitchen and dining room serves residents 3 meals a day, every day of the year. For this event, our group will help prepare food, serve meals, assist residents in the dining room, wash dishes, and clean surfaces. PLAN: We will be preparing / serving / cleaning for BRUNCH from 10:30am to 12:30pm and have space for a total of 7 volunteers. Please arrive at 10:20am and wear closed-toe shoes and long pants. LOCATION: Faith Mission – Grant Kitchen is located at 245 N. Grant Ave. Enter the kitchen at Dock 1 (in the back of the building), indicated in the attached map. On-site parking in the adjacent lot and street parking is available in the surrounding area. Below are some links / attachments with additional info/details: IMPORTANT REMINDER: Our group will be providing all of the volunteers on this day so a firm RSVP count is essential. Please only sign up if you are certain you’ll be able to attend. If something unavoidable comes up, please try to update your RSVP no later than one week prior to the event. With few exceptions, no shows or cancelations within 1 week of the event will not be eligible for future CMG Gives Back events. I appreciate your understanding as we try to ensure the agencies have the volunteers needed to provide the essential services they provide to the vulnerable population they serve. Our Partner Agency for this event is Lutheran Social Services! A huge THANK YOU to all of YOU for volunteering at this (and any of our previous) CMG Gives Back events! Should be another good/fun/meaningful time together, Dan

Join us this Thursday (5/14) at 6:30 pm at Rocky Fork Metro Park in Westerville as we walk about 2.5 miles of a fully paved trail. The Beech Woodland trail is a flat yet scenic trail with a variety of landscapes. Let’s take it in together!

We connect you with up to 30 Men or Women tennis partners close to your PLAYING REGION and skill level. This program is less competitive, no champions crowned, no league standings just dedicated tennis partners who want to meet up with you on the courts. Players will meet up to play a tennis match or just to hit around. Just go through the [Join Page](https://www.tenniscolumbus.com/partner-program) to enter this program. [https://www.tenniscolumbus.com/partner-program](https://www.tenniscolumbus.com/partner-program)

FREE event [https://www.ccad.edu/chroma](https://www.ccad.edu/chroma) Friday, May 15, 3–7 p.m. CCAD campus, 60 Cleveland Ave, Columbus, OH Join Columbus College of Art & Design for *2025* *Chroma: Best of CCAD*, our annual campuswide exhibition showcasing outstanding student work from across the college’s academic programs. This faculty-juried show features select work from CCAD students of all class years, and is a can’t-miss end-of-year campus celebration recognizing their tremendous achievements. It’ll be a night of fun and entertainment, with interactive games, animation and film screenings, art symposiums, poetry and prose readings, and more (along with some of the best local food trucks). *Chroma* is free and open to all. Many exhibitions including... **Game Art & Design:** **DSB, first floor, Welcome Center lobby and Room 115**