Civic Groups Berlin
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Feiert mit uns 2 Jahre Brompton Junction Berlin
Wed, May 27, 2:30 PMBegleitet uns auf eine schöne gemeinsame Ausfahrt durch Berlin und feiert mit uns das zweijährige Jubiläum von Brompton Junction Berlin. Die Tour startet an der Brompton Junction Berlin, führt durch einige der schönsten Fahrradstrecken der Stadt und endet wieder an der Junction bei einem entspannten Ausklang zusammen. Start & Ziel: Brompton Junction Berlin ([Rosenthaler Str. 31, 10178 Berlin](https://www.google.com/maps/place//data=!4m2!3m1!1s0x47a8513af0ba2b3d:0x7f5d1dea3be52036?sa=X&ved=1t:8290&ictx=111)) Mittwoch, 27. Mai Start der Ausfahrt: 16:30 Uhr Bitte gebt uns eine kurze Rückmeldung (RSVP). Link zur Ausfahrt: https://www.komoot.com/tour/2932512970?share_token=a1kJm4CzTo7ymGAxUEzzhiCbe7JevCtJ7wpbp55qavNpwo43ad&ref=wtd&t_s=referral&t_cid=route_share&t_ref_username=138017303207

Quiz Walk – Prenzlberg (Kollwitzkiez) #74
Wed, May 27, 5:30 PMWhat's a great way to **have fun**, **meet people** and **explore Berlin**? *Hint:* It's happening in **Prenzlauer Berg (Kollwitzkiez)** on **Wed. May 27th at 7:30 PM**. *Answer:* The next **Quiz Walk!** Join a team, walk from clue to clue and answer ca. **15 all new questions** about music, sports, culture, movies/TV, history, geography, history, science etc.! ― It's a great way to **meet people** ― ― **Use your knowledge** and help your team **win** ― ― Get to know **a Berlin neighborhood** (Kiez) better at each event ― ― Learn exciting things at these **fun, interactive quizzes** ― ― Afterwards, **meet up to chat**, and find out the **answers** ― **How it works:** We meet where Kastanienallee meets Schönhauser Allee (U8, trams 12, 50, M1, M10 - see **Start** below) and form **teams of 4** players. Then we **walk from clue to clue**. **Use teamwork** to answer the questions or **ask passers by for help**! See and answer the questions on one smartphone per team and **see your score** **as you play**! No rush – speed doesn't count. **Start:** Across from **Kastanienallee 2, 10435 Berlin,** in the little triangular park, across from the *Pane e Vino* restaurant. **Note:** Please bring a **2€** **donation** to cover the costs of organizing. And please be on time, as we leave the meeting point within 10 minutes. **Looking forward to seeing you!**

Build Smarter AI: GraphRAG & Generative AI Workshop
Wed, May 27, 2:00 PMRegister: https://www.eventbrite.de/e/build-smarter-ai-graphrag-generative-ai-workshop-tickets-1985345958205 Join us for a hands-on introduction to Generative AI with Neo4j at 42 Berlin. **Large language models are powerful — but without structure, they lose context fast.** **As part of the mAI ist für AI series at 42 Berlin, this workshop explores how [Neo4j](https://neo4j.com/ "https://neo4j.com/") can improve GenAI applications and reduce common challenges such as hallucinations.** In this instructor-led workshop, participants will explore how graph databases can improve GenAI applications and reduce common challenges such as hallucinations. You’ll learn key concepts including Large Language Models (LLMs), Retrieval-Augmented Generation (RAG), GraphRAG, vector search, knowledge graphs, and AI agents. The workshop follows a **mixed format, combining short theoretical inputs with practical exercises**. Participants will work through tasks while instructors are available to support and answer questions.

Evening Worship Service
Sat, May 23, 4:00 PMJoin us for a welcoming and reflective Saturday evening worship service in Engish. This service follows a classic liturgical form and includes Holy Communion, offering a meaningful and grounding way to end the week. The liturgy is a bit shorter than our Sunday service. After worship, stay for fellowship and conversation. Whether you are new to faith, returning after a long time, exploring Christianity, or deeply rooted in the tradition — you are truly welcome here. And when we say *all*, we mean **all**. Come as you are. You belong. We celebrate open communion, meaing all are wecome to recieve Holy Communion.

Contract Assertions on Virtual Functions
Tue, May 26, 4:30 PMThe next **Berlin C++ Meetup** hosted by think-cell takes place on **Tuesday, May 26**. Join us for an evening with the Berlin C++ community! This meetup is a chance to step away from your day to day work, meet other developers, exchange ideas, and have real conversations about modern C++ in a relaxed setting. \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- ## **Talk** ### **Contract assertions on virtual functions** *Timur Doumler – Citadel Securities* Contracts assertions were introduced in C++26, but they cannot be applied to virtual functions. To close this gap, we first need to answer the question: how should contracts assertions behave in the presence of inheritance and runtime polymorphism? In this talk, Timur explores why this problem is harder than it looks. He reviews existing approaches from other languages, such as Eiffel, D, and Ada, highlights why they don’t fully translate to C++, and outlines the key design challenges involved. He then presents a concrete proposal for how contract assertions on virtual functions could work in C++, balancing correctness, safety, and usability. Along the way, the talk touches on good API design, the true meaning of the Liskov substitution principle, and how to reason about program correctness. \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- 📅 **Date & Time:** Tuesday, May 26, 2026 – 18:30–21:30 📍 **Location:** Le Wagon Coding Bootcamp, Rudi-Dutschke-Straße 26, 10969 Berlin 🕒 **Agenda** 18:30 – Doors open 19:00 – Talk + Q&A 20:40 – Pizza, Drinks and Networking \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- **RSVP now to save your seat!**

Sunday Service 10:45am
Sun, May 24, 8:45 AMYou are welcome to join Sunday services at our church location. Feel free to contact us if you have any questions.
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