Open Source

Join Vienna’s longest-running English stand-up comedy open mic for laughs, live comedy, and English-language performances. Drop by to see experienced comedians work on their new jokes or maybe you will catch somebody trying to be funny on stage for the first time ever! We don't really know what will happen and that's part of the magic! Join Vienna’s longest-running English stand-up comedy open mic for laughs, live comedy, and English-language performances. Drop by to see experienced comedians work on their new jokes or maybe you will catch somebody trying to be funny on stage for the first time ever! We don't really know what will happen and that's part of the magic! **Do you want to perform yourself?** Hit us up on Instagram (@wiener.comedy) or Facebook (Wiener Comedy). Not on social media? Send us an email at wienercomedy5000@gmail.com If you’re waiting on a reply, please also check your spam folder. **Do you just want to watch?** Just come on over before 19:30, wear something comfortable, enjoy a pint and/or a burger, lean back and let us tickle your funny bone! **Tickets:** Seats can fill up fast, so we recommend reserving yours on Eventbrite. This is a *pay what you like* show so it doesn't cost you to reserve your seat. **Need a table for dinner or coming with a larger group?** Write us an email to sort everything out: wienercomedy5000@gmail.com or contact Charlie P's directly Doors Open: 19:00 Show Starts: 19:30 ***We'll hold your reservations until 19:20 at which time we will release the remaining seats to the public*** Age - 16+ Good talk, see you out there! **Do you want to perform yourself?** Hit us up on Instagram (@wiener.comedy) or Facebook (Wiener Comedy). Not on social media? Send us an email at wienercomedy5000@gmail.com If you’re waiting on a reply, please also check your spam folder. **Do you just want to watch?** Just come on over before 19:30, wear something comfortable, enjoy a pint and/or a burger, lean back and let us tickle your funny bone! **Tickets:** Seats can fill up fast, so we recommend reserving yours on Eventbrite. This is a *pay what you like* show so it doesn't cost you to reserve your seat. **Need a table for dinner or coming with a larger group?** Write us an email to sort everything out: wienercomedy5000@gmail.com or contact Charlie P's directly Doors Open: 19:00 Show Starts: 19:30 ***We'll hold your reservations until 19:20 at which time we will release the remaining seats to the public*** Age - 16+ Good talk, see you out there!

Hello everyone! We're excited to announce **Vienna's first official** **Codex Community Meetup**, co-hosted with **Vienna AI Engineering** on Monday, April 27! For this meetup we are returning to **Greentube** who will generously host us at their HQ on **Wiedner Hauptstraße**. Catch up on the latest Codex updates, see live demos, and learn best practices from power users. Hear directly from the top teams of the [Codex Hackathon Vienna](https://luma.com/18ivobmb?tk=RIkbHV) about what they built, see live demos of their projects, and learn best practices from power users of Codex. Whether you’re already using Codex or simply curious about coding agents, this is your chance to connect with peers and explore how AI is transforming the way we build software. ⚠️ **Important: [The official registration is on Luma only](https://luma.com/vienna-ai-engineering) and spots are limited there to 150.** In order to avoid double-bookings, we'll restrict the RSVPs here only to the Organizer Team. 👉 Everybody else please **[register on Luma](https://luma.com/vienna-ai-engineering)** The venue check-in will use the Luma guestlist, so please make sure you're registered there. FYI, since some of our partners like OpenAI use Luma to coordinate events worldwide, we must also use it when we make branded events like this one. So in order to make sure you are directly informed about this type of events, make sure you **[subscribe to our Luma calendar](https://luma.com/vienna-ai-engineering)**. The Meetup platform has been having a lot of hiccups in recent years, and if Luma turns out to be better, we might even switch to it as our main platform permanently. \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- **Schedule** 18:00 - Get together with food and beverages 18:30 - Welcome & Intro 18:40 - Presentations from the top hackathon teams 20:30 - More drinks & networking. Join us on April 27 for an evening of demos, insights, and networking at the **Greentube HQ**! \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- This event is sponsored by **Greentube GmbH** **Greentube** is one of the world's leading full-service providers in the online and mobile gaming sector, offering high-end entertainment and cutting-edge technology solutions. Sponsoring the Vienna AI Engineering Meetup is part of our effort to contribute to the growth of a vibrant tech and AI engineering community in Vienna. **Careers at Greentube** Interested in joining our team? Explore current opportunities and learn more about working at Greentube on our careers page: [https://www.greentube.com/careers/](https://www.greentube.com/careers/)

Join our outdoor yoga class in Vienna for a relaxing park yoga session designed for beginners and experienced yogis. Please read the complete event description ✨ What to Expect • Breath-led Yoga Flow • Gentle stretching and mindful movement • Relaxing outdoor atmosphere • Friendly and welcoming community 🧘 Level Beginner to intermediate 🎒 What to Bring • Yoga mat • Comfortable clothes • Water 💛 Energy Exchange Pay what you feel right (suggested between €10-€20) **Join us for instant updates:** **https://chat.whatsapp.com/JbCZPIUQrCv6lhd00M0oXI** 📍 **Location**: Auer-Welsbach Park – near the U4 Grünbergasse exit We will be at this location https://maps.app.goo.gl/YfwydU7UN9YiWZWE6 More details: Exit the U4 at Grünbergasse. When you come out of the station, turn left and cross the street. You’ll see the park entrance directly ahead. Walk about 100 meters inside the park, and you’ll find us on the right side on the grass

Herzlich Willkommen zu unserem kostenlosen Meditations Kurs! Einstieg ist jederzeit möglich, geeignet für Anfänger als auch Fortgeschrittene. Hier werden dir Grundlagen und Wissen von Sahaja Yoga-Meditation vorgestellt: speziell über Kundalini, Energiezentren, subtile Kanäle in und einfache Techniken, die unterstützend auf unser inneres Wachstum wirken und uns ins Gleichgewicht bringen. Wir lernen wie wir in unserem täglichen Leben in Balance kommen und in einem Zustand der Stille Kraft schöpfen können. Ein zentraler Punkt ist die spürbare Stille in jedem von uns. Sie ist der Moment im Hier und Jetzt, der uns Inspiration, Freude und vieles mehr schenkt. In diesem Zustand zu verweilen bedeutet Meditation - und das ist die Quintessenz für inneres Wachstum und Weiterentwicklung. Wir freuen uns schon auf dich!

Get ready for a Pub Quiz Night at Munchy The Urban Kitchen, where curiosity meets good vibes. From world culture and history to pop culture, sports, music, cinema, and unexpected facts — this quiz is all about testing what you really know. Bring your friends, form a team, grab a drink, and enjoy a relaxed yet competitive evening. No phones, no Google — just brains, laughs, and great pub energy. Whether you’re a quiz lover or just in for a fun night out, everyone’s welcome. Expect a friendly atmosphere, mixed questions for all levels, and a night that’s more about enjoying the moment than just winning. Think fast, trust your instincts, and let’s see who takes the crown. Good questions. Cold drinks. Proper pub quiz vibes. Enjoy your nice Monday evening! [Follow us on Instagram](https://www.instagram.com/makingfriendsinvienna)❤️ [Follow us on Facebook](https://www.facebook.com/makingfriendsinvienna) Do you have questions? Write us on Instagram

**Discover the Power of Public Speaking & Leadership — Join the Blue Danube Leaders!** Are you looking for a new hobby that's not only fun but also helps you grow? Join us at **Blue Danube Leaders**, a Toastmasters club where you can improve your **public speaking**, **leadership**, and **communication** skills - all in a friendly, encouraging environment. Whether you’re just starting out or are already a seasoned speaker, you're welcome as our guest. **What happens at a Meeting?** Our meetings follow a structured, interactive format: * **Welcome and Introduction** The meetings begin with a warm welcome from the Club President and the host (called *Toastmaster of the Evening)*. Then, we do a short introduction round where everyone - guests too - say a few words on the evening's topic. * **Word of the Day** A challenge that builds your language skills and sharpens your attention to word choice. A special word is introduced and everyone is invited to use this word whenever they speak. * **Table Topics** This is an exciting segment! Volunteers - guests too! - are invited to speak for 1-2 minutes on a surprise question or topic. It's a great way to practice thinking on your feet. * ***Short Break of 10 minutes*** * **Prepared Speeches** * Members deliver speeches prepared ahead of time, usually 5-7 minutes in length. Each speech is a step in the Toastmasters learning pathway. * **Evaluations** Every speech will be thoughtfully evaluated by a designated Evaluator. These evaluations focus on strengths, improvement tips, and encouragement. It's a crucial part of the Toastmasters experience. * **Role Reports** Throughout the meeting, members take on supportive roles that ensure the flow of the evening and give everyone a chance to grow. **Be our guest!** This meetup is open to guests. Toastmasters have a separate platform for the member registration. There are always 10+ people in the meeting. Join us at **18:45 CET** for a casual **Meet & Greet**; The program starts **sharp at 19:00 CET.** After the meeting, we often head to a nearby spot for food or drinks - a great way to relax and connect! Learn more: https://bluedanubeleaders.at/ Email: info@bluedanubeleaders.at

We're very happy to announce our next event at Café zum 1.Stock in the 21. district Floridsdorf! We're going to have a lovely life drawing session with Sayuri, an experienced model, with various poses between 2 and 20minutes. The café is located at Schloßhoferstraße 11, a 1minute walk from Bahnhof Floridsdorf (U6, S-Bahn). Please arrive early to secure the best seats, we start punctually at 18:00. Please bring your own drawing equipment, all you need is paper and a pen. All levels are very welcome, there are always experienced artists to help out if needed :) Price will be 5€ + drinks to support the café

Agenda (preliminary) 18:00 doors Open 18:20 welcome, doors closing soon 18:30 **Centralising and automating your API contracts using a schema registry** 19:30 Networking 20:00 **OpenJDK, the JCP and JUGs: contributing to Java to become a beyond senior expert** 21:00 networking Talk 1: **Centralising and automating your API contracts using a schema registry** No matter if REST or message-based, your APIs need to change. Describing the API using OpenAPI or some other specification language is good. But how to make sure all affected parties have the same version of the API spec and that spec changes don't happen before all API users are ready? Let's discover how schema registries can bring order and automation in this. We'll take a look at how you can use them with Java and why the choice of the schema specification language matters. **About Marián Varga** Marián Varga has worked with Java for more than 20 years. He wrote the book Mastering RESTful Web Services with Java and keeps helping software development projects get their integrations right. Talk 2: **OpenJDK, the JCP and JUGs: contributing to Java to become a beyond senior expert** The Java technology evolves through 3 main pillars: open source, standards and community participation. This interactive presentation will show what happens behind the scenes in those processes, how you can participate, and practical ways you can use Java's evolution to build technical expertise, and advance your career beyond the senior level. In this session you will: \- Understand the secret Java Champions use to build technical expertise \- How to think like Java's main architect\, and build impact in your project and beyond \- How to use Java's pillars to build a growth spiral for your own career **About Bruno Souza** Since 1995, [Bruno Souza](https://www.linkedin.com/in/brjavaman/) has been helping Java developers advance their careers and work on exciting projects. A recognized Java Evangelist and Java Champion, as well as a board member of the Java Community Process, Bruno founded and leads SouJava, the Brazilian Java Users Society. In his book, “Developer Career Masterplan,” Bruno shares insights on career development for senior developers, topics he further explores in his Code4.life project.

**Selbstwert & Sichtbarkeit** 2.–3. Mai 2026 | Wien Ein Workshop von und mit Michael Rosenberg - Coach, Speaker & Visionär. Du hast Talent, aber ein Sichtbarkeits-Thema. Du weißt viel, du kannst viel. Und trotzdem hältst du dich zurück. Dieser Workshop ist kein Rhetoriktraining. Kein „Stell dich mal vorne hin“. Es ist ein Raum für echte Arbeit an DIR: • deinem Selbstwert • deiner Präsenz • deiner inneren Klarheit • deiner Wirkung Zwei Tage, um zu erleben, wie es sich anfühlt, nicht angepasst sichtbar zu sein, sondern selbstbestimmt. Wir arbeiten in einer kleinen Gruppe (max. 10 Teilnehmer). Das schafft Tiefe. Verbindung. Echtheit. Wenn du spürst, dass du dich nicht länger kleiner machen willst, dann ist das dein Raum. 📍 Wien 💶 € 280 🔗 Anmeldung: [info@rosenberg.vision](info@rosenberg.vision)

**Our next show:** [next improv Show](https://www.iicv.at/improvshow) **Leader of the session:** [IICV Calendar](https://www.iicv.at/event-calendar) **What is it ?** An open improv session for all experience levels. Come play, explore, and have fun in a supportive, low-pressure environment. **How to register ?** Meetup registration opens on **Sunday 13:00** for the following Wednesday meetup. Should your plans change, we kindly ask you to **cancel.** For security reason, you cannot join the session if you did not registered. **How much ?** Free for IICV members\* 10 Euros for everybody else. You can pay contactless or cash. \* go to [iicv.at](https://www.iicv.at/) to become a member (13EUR per month until you cancel your membership). **Anything to report?** Please give us an anonymous [feedback](https://docs.google.com/forms/d/1oidbMUMs_Zz-rSQ9O4HcR_axPG_zvUb1dc1ssG5IWaw/edit) \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* **Meetup priority**: Please do not enroll to meetup priority!!! You can enroll to any open session without having it (just close the adv. window). **Being meetup priority will not give you any advantage in the waiting list** neither as we will insure to respect the real order of priority. **Photograph policy**: Please be aware that photos will be taken during the open session for social media and newsletters. Before any photos are taken, we ask participants for their consent and provide an opportunity to opt out. **Code of Conduct**: We are a Vienna-based international community seeking to explore, play, practice, and perform improvised arts in a group setting. In treating this space with integrity and professionalism, we are committed to facilitating a harassment-free space for all persons regardless of cultural background, disability, gender, sexual orientation, race, etc. Therefore, the IICV will not tolerate any inappropriate behaviour as per our [Code Of Conduct](https://www.iicv.at/code-of-conduct). Repeated violations of our guidelines can and will result in warnings, removal from sessions, or cancelation of membership. The **International Improv Community in Vienna** IICV e.V. ZVR Nr:1236421179

OpenClaw Deep Dive into the Future of Autonomous Business Agents 17:30 – 23:30 \| Fiskaly GmbH\, Mariahilfer Strasse 36\, 1070 Wien\, Austria ⚠️ **Please Note: This is a free event, made possible by neob.ai. Seats are strictly limited and seating cannot be guaranteed. Admission is on a First Come, First Served basis. We strongly recommend arriving early to secure your spot.** SPEAKERS AND KEY TOPICS Andrew Demczuk, MSc — OpenClaw Core Maintainer Don't hack me, bro Ed Prinz — Founder & CEO, neob.ai Web4: The Revolution of the New Internet Based on Agents More speakers to be announced. ABOUT OPENCLAW Forget simple Q&A. We are entering the era of proactive AI. OpenClaw (formerly ClawdBot) is an open source framework that closes the gap between generative AI and real operational execution. AI agents operate inside everyday messengers such as Telegram or WhatsApp and autonomously perform complex business workflows. This event provides a deep dive into the architecture, capabilities, risks, and future implications of agentic systems that will fundamentally reshape how companies operate. WHY OPENCLAW OpenClaw represents a major milestone. For the first time, AI truly acts as a proactive assistant. It does not just respond to commands. It informs you, prepares briefings, and executes tasks autonomously within familiar interfaces such as WhatsApp or Telegram. This marks the transition from passive tools to operational AI agents.

**❗️ 👉 TO THE EVENT:** [Kafka through the lens of .NET](https://www.meetup.com/dotnet-austria/events/313929442/?utm_medium=referral&utm_campaign=share-btn_savedevents_share_modal&utm_source=link&utm_version=v2&member_id=357085385)**❗️** In cooperation with the [.NET Community Austria by DotNetDevs.at](https://www.meetup.com/dotnet-austria/) we are hosting a meetup **at the SQUER Office Vienna** **👉** Please register on the dedicated [Kafka through the lens of .NET](https://www.meetup.com/dotnet-austria/events/313929442/?utm_medium=referral&utm_campaign=share-btn_savedevents_share_modal&utm_source=link&utm_version=v2&member_id=357085385) Page to join us on April 28th at 6:00 PM 🥳 We are looking forward to seeing you there!

This event is for people who join the event in person at SQUER (https://www.squer.io/). If you join the event remotely, please RSVP here: [https://www.meetup.com/dotnet-austria/events/313929458](https://www.meetup.com/dotnet-austria/events/313929458) This meetup is organized by DotNetDevs.at (https://dotnetdevs.at/). Abstract So you want to build an event-driven system and wonder how to put your data in motion? Well, Kafka is one of the answers! With its rich ecosystem, it will help you to achieve this goal. Through patterns and examples, we will look into building blocks of Kafka, be it records, partitions, (de)serialization, schema registry and kafka streams, to libraries and frameworks that are existing for it in the .NET ecosystem. This session is designed for .NET developers, team leads and architects who want to learn how to use Kafka in their applications. By the end of this session, you will have a solid understanding of the basic concepts of Kafka and how to use them in your .NET applications. Shahab is a seasoned software engineer with more than 20 years of experience, specializing in software architecture and event driven systems. He thrives on challenges and enjoys mentoring others. With excellent communication skills, he fosters autonomous teamwork and emphasizes respect within the team. Embracing change is his motto, advocating for collaborative environments where everyone's contributions are valued. Location, Food & Drinks are sponsored by SQUER. Timetable: \- 18:00: Door opens at SQUER \- 18:15: Intro \- 18:20: Talk starts \- 19:30: Food & Drinks \- 21:00: End Recordings will be available afterward at https://go.dotnetdevs.at/recordings This meetup is organized by DotNetDevs.at (https://dotnetdevs.at/). DotNetDevs.at is sponsored by: \- RUBICON IT GmbH \(https://www\.rubicon\.eu/rubicon/\) \- JetBrains \(https://jetbrains\.com\)

A hands-on migration and tuning workshop for DACH engineers moving from cloud APIs to local LLMs. 📅 **28.04.2026 · 17:30 – 22:00 CET** 📍 **fiskaly office — Mariahilfer Str. 36, Wien** ⚠️ **RSVPs are handled on Eventbrite, not Meetup.** Marking yourself as "going" here does not reserve your spot. Please register on Eventbrite 👉 [https://www.eventbrite.at/e/off-cloud-by-sovereign-ai-lab-tickets-1987825036194](https://www.eventbrite.at/e/off-cloud-by-sovereign-ai-lab-tickets-1987825036194) *** **ABOUT THIS SESSION** Your cloud API invoice is climbing. Your compliance team is asking harder questions. You've heard "just run it locally," but nobody has shown you how. And many engineers who already run locally are leaving meaningful headroom on their hardware. This session fixes both problems in the same room. **Two tracks:** 🔹 **Track A — Cloud to Local** For teams currently using hosted LLM APIs who have never run local inference. You walk in with an API key. You walk out with a working local model, a drop-in API swap, and a cost comparison template you can fill with your own workload numbers. 🔹 **Track B — GPU Whispering** For engineers already running local inference engines who want to go deeper than default settings. Quantization, VRAM layout, CPU memory bus saturation, real benchmarks on real hardware. Cross over during open lab. Ask the awkward questions. *** **WHO THIS IS FOR** * Technical founders, CTOs, and engineers whose pay-per-token invoices have become a fast-growing expense line * ML and backend engineers who want to get off the API treadmill * DevOps leads and infrastructure architects already running local models who want to go deeper than default settings * Sectors: healthcare, legal, manufacturing, financial services, media, startups *** **GROUND RULES** ✅ No sales pitches. Ever. ✅ Bring a laptop. If you're already running local models, bring that setup. If not, we'll get you started during doors (17:30–18:00), and a pre-event setup gist goes out the day before. ✅ All skill levels welcome, provided you write code. *** **⚠️ IMPORTANT — HOW TO RSVP** To secure your spot, you **must register on Eventbrite**: 👉 [https://www.eventbrite.at/e/off-cloud-by-sovereign-ai-lab-tickets-1987825036194](https://www.eventbrite.at/e/off-cloud-by-sovereign-ai-lab-tickets-1987825036194) Meetup RSVPs will not be counted toward attendance. See you on April 28th! 🚀

Columbus Code & Coffee is an inclusive, informal co-working session. People of all skill levels attend, and we love it that way. Many people (optionally) bring projects to work on, and many other people (optionally) socialize the entire time. It's entirely up to you! **What to Expect at the Intro Circle** \~\~\~\~\~\~\~\~\~\~\~\~\~ Near the beginning of the event (1:30 pm), we do a standup: * Organizer announcements, updates, and logistics Round 1 - (7 secs max): * Your name * What you're working on * What you can help others with Round 2: * Community events you wanna plug. If none, that's cool too. Round 3: * Job opportunities you're hiring for OR announce that you are looking for one. If none, that's cool. After the introduction circle, everything is self-organized! Feel free to work alone, pair up, attend one of our workshops/presentations, or mingle!

Columbus Code & Coffee is an inclusive, informal co-working session. People of all skill levels attend, and we love it that way. Many people (optionally) bring projects to work on, and many other people (optionally) socialize the entire time. It's entirely up to you! **What to Expect at the Intro Circle** \~\~\~\~\~\~\~\~\~\~\~\~\~ Near the beginning of the event (1:30 pm), we do a standup: * Organizer announcements, updates, and logistics Round 1 - (7 secs max): * Your name * What you're working on * What you can help others with Round 2: * Community events you wanna plug. If none, that's cool too. Round 3: * Job opportunities you're hiring for OR announce that you are looking for one. If none, that's cool. After the introduction circle, everything is self-organized! Feel free to work alone, pair up, attend one of our workshops/presentations, or mingle!

Main Library, Meeting Room 2B Join us for a welcoming evening of reflection, gentle music, and meaningful conversation. We’ll begin with a short grounding moment, followed by a brief reading from spiritual or philosophical traditions, and an open reflection circle where participants can share (or simply listen). Libera Animae is an interfaith community focused on inner growth, creativity, and authentic connection. All backgrounds are welcome.

**Improving Office in Franklinton** Physical location: Improving Office 330 Rush Alley Suite #150 Columbus, OH 43215 Schedule: 6:00 p.m.: Socialize, eat, and drink. Improving will be providing pizza and beverages. 6:30 to 8:00 pm. Main meeting and presentation(s). Topic: This month Chris Pazsint will be talking about Agentic Coding. How does one use CLI Based Agents, and Agentic IDEs such as Cursor, Kiro, Antigravity? How to include agentic coding plugins for IDEs you already love such as Visual Studio Code. We meet on the last Monday of each Month. Presentations are given by members and friends of this group. If you would like to do a presentation (small or large) on a python topic, please contact Central OH Python at centralohpython@gmail.com

Come out to Improving for our monthly iOS and Mac meetings. This Month's Presentation: Nothing yet. (You should volunteer). What is Cocoaheads (http://cocoaheads.org/)? CocoaHeads is a group devoted to discussion of Apple Computer's Cocoa Framework for programming on MacOS X and iOS (including the iPhone, iPad and Apple Watch). During monthly meetings, members present on their projects and offer tutorials on various programming topics. What is BuckeyeCocoa (http://buckeyecocoa.org/)? BuckeyeCocoa is a group of Objective-C/Swift developers/enthusiasts. We host monthly Cocoaheads and near-weekly NSCoder meetings in Columbus, Ohio. The meetings are free to attend. Presentations! Presenters welcome! We are always in need of people willing to present material. Any Swift and/or Objective-C related topic is welcome. Times can be 5 minutes (i.e. lightning talks) to a maximum of 2 hours. Interested? Contact info is on the BuckeyeCocoa website. To volunteer for a presentation contact us at @BuckeyeCocoa on Twitter. Follow us on Twitter! @BuckeyeCocoa (https://twitter.com/#!/Buckeyecocoa/) For more information: http://buckeyecocoa.org/

Want to be a speaker? submit your talk to our Call for Presenters!!! https://sessionize.com/cbus-hug-2026/