Game Theory

Speaker: **Tomislav Maričević** Title: **Nix ❤️ Python: Maybe you don't need devcontainers after all** Life is too short to wait for Docker image rebuilds during everyday development. This talk shows how Nix and devenv provide deterministic, host-native development environments that model compilers, runtimes, system libraries, and tooling as a reproducible dependency graph — eliminating much of the toolchain complexity developers often push into Docker and Docker Compose. We will compare the failure modes each approach addresses, demonstrate where devenv can replace Compose in local workflows, and clarify where containers remain the correct abstraction. \-\-\-\-\-\-\-\- Join us on **Tuesday** at MaMa for a fun technical deep dive. Drinks and, most likely, very opinionated discussion afterwards at [Old Pharmacy Pub](https://maps.app.goo.gl/AeaRdnBrMqPiRhvPA) 🍻🍷🥤☕️

Franjo Kmet – Profesionalni planinski i gorski vodič Osnivač i voditelj brenda **Mountain Fit** – programa usmjerenog na planinarenje, alpinizam i outdoor aktivnosti. Voditelj planinarskih škola, visokogorskih tečajeva, ledenjačkih i sportsko-penjačkih programa. Strastveni prenositelj znanja i iskustava iz planinarenja i alpinizma. Organizator i vodič uspona, trekinga, ekspedicija i planinarskih izleta diljem svijeta – od Alpa do Himalaje i Patagonije. Planine su prirodni "terapeut" koji djeluje na više razina – od fiziologije (endorphini, serotonin) do egzistencijalne promjene. Najmoćniji efekt često dolazi upravo kroz smanjenje ega – kad ego prestane biti glavni lik priče, um postaje tiši, otvoreniji i sretniji. Teme LevelUp Meetup-a: **Smanjenje stresa i anksioznosti** Planine pružaju tišinu, ritmično hodanje i fokus na svaki korak – to brzo prekida krug briga i pretjeranog razmišljanja. * **Povećanje osjećaja prisutnosti i mindfulnessa** Hodanje po stazi, disanje na većoj visini, promatranje oblaka ili slušanja vjetra prirodno nas uvodi u „ovdje i sada“, smanjujući mentalni šum i preopterećenost mislima. * **Doživljaj strahopoštovanja i šire perspektive** Pogled s vrha, ogromnost planina i beskrajno nebo izazivaju duboki osjećaj strahopoštovanja. * **Povećanje samopouzdanja i osjećaja postignuća** Svaki uspješan uspon, savladavanje tehničkog dijela ili dolazak na vrh gradi unutarnju snagu i samopoštovanje. * **Povećana povezanost s prirodom i osjećaj smisla života** Boravak u planinama jača osjećaj da smo dio prirode. Napredak je nemoguć bez promjene, i oni koji ne mogu promijeniti svoj um ne mogu promijeniti ništa! 📍 Pivana, Ilica 222, Zagreb 🗓 11.02.2026. u 18:00 h Organizator: Međunarodni institut za emocionalnu zrelost – zajednica poduzetnika, stručnjaka i znanstvenika posvećenih razvoju pojedinaca i društva.🌐 http://emotionalmaturity.eu

Hi everyone! Join us for the RubyZG February. We'll hear about building a query builder with AI and what is like to work at a company where Ruby On Rails itself was created. This event is hosted by [DECODE](https://decode.agency/about-us/) who will be providing snacks and refreshments after the formal part of the meetup. Btw. they are hiring, so be sure to check [their open positions](https://decode.agency/open-positions/). For those coming by car, there is no dedicated parking but there should be plenty of parking at that time in the street in front of the building. See you at DECODE! \*\*\* How to use AI agents to build query builder by [Lovro Žmak](https://www.linkedin.com/in/lovro-zmak-22706253/) Does code generation with AI agents always help or is it better to manually write it sometimes ? How does Arel fit into the story and how did it influence the code design decisions ? This talk will bring you the story of building a query builder with AI agents, from initial wrong directions to the final solution. Through practical examples and live demos, you will receive guidelines on how to use AI agents to generate usable and sustainable code. **Working at 37signals: The birthplace of Ruby On Rails** by [Stanko Krtalić Rusendić](https://www.linkedin.com/in/stanko-krtalic/) Last July Stanko started working at [37signals](https://37signals.com/), the company behind Basecamp, Hey & Fizzy and the place from which the very first version or Ruby On Rails was extracted back in 2004. It's still the company with the largest influence on the direction of Rails development with major contributions like ActiveStorage, SolidQueue, Turbo & Stimulus. We'll hear how the company works and what it's like to work there.

We’re happy to announce the next **AWS User Group Zagreb meetup**, once again focused on a **recap of this year’s AWS re:Invent**, followed by a short startup spotlight. **Date**: February 12, 2026 **Time**: 18:00 **Venue**: Planinska 13a, third floor, Tellus [Google Maps Link](https://maps.app.goo.gl/bMHxbf56yZni87ip6) When you exit the elevator, the doors are on the right with a sign "Tellus". ### **Speakers** **Bojan Sovilj** Bojan is an active AWS community member and frequent speaker who regularly attends AWS re:Invent. He focuses on translating AWS announcements into practical insights, helping teams understand how new services and changes impact real-world architectures and development workflows. **Bruno Rožman** Bruno is part of the Sonder AI team and will briefly introduce the product and its motivation. **Ante Čerkez** Ante is the CTO at Sonder AI and will touch on how AWS is used to support the Sonder platform. *** ### **Agenda** #### **AWS re:Invent 2025 Recap** **Speaker:** Bojan Sovilj AWS re:Invent continues to grow every year, with a large number of announcements across infrastructure, application development, data, and AI. In this session, Bojan will deliver a **structured and practical recap of AWS re:Invent 2025**, focusing on the announcements and trends that are most relevant for AWS users today. The talk will cover: * The most important **service launches and updates** * Key **technology and architectural trends** introduced at re:Invent * Context on what is truly new versus incremental changes * How these updates may influence **application design, infrastructure, and operations** Rather than attempting to cover everything, the session will focus on **relevance and impact**, helping attendees decide what’s worth exploring further. *** #### **Startup Spotlight: Sonder AI** **Speakers:** Bruno Rožman & Ante Čerkez **Topic:** **Why networking is inefficient today and how Sonder is building a “personal connection system” using AWS** A short startup-focused talk on: * The problem Sonder is addressing in modern networking * How AWS supports their product development *** ### **Networking** After the talks, we’ll continue with informal networking, drinks, and discussions with fellow AWS community members. *** **Attendance is free, registration is required.**

Where locals, expats & travellers turn Thursday into Small Friday. Hey everyone! Whether you’ve just landed in Zagreb, been here a while, or live right around the corner, **Small Friday International Zagreb** (**[SFIZ.FUN](https://sites.google.com/view/smallfridayinternationalzagreb)**) is your go-to for winter evenings, language swapping, and good times with great people. 📍 **Where?** The Beertija, Pavla Hatza 16 🕗 **When?** Thursdays, every other week from 8PM ✨ Free to join, just grab a drink and support the bar’s rockin’ vibe 🍺🎸 ✨ Open to all, all ages, all vibes, all language levels welcome 💬 **What to expect?** 🗣️ **Language Exchange:** English, Croatian, Spanish, French, German, Italian, Ukrainian, Russian… you name it 💬🌐 🌍 **Cultural Vibes:** Locals, expats, travellers, Erasmus students . . . sharing tips, stories & laughs 🎭✨ 🤝 **New Connections:** Real convos, real mates, winter evenings to remember 🤗 🍷 **Weekend Planners:** From concerts, winter sports, partying to fests and day trips, let’s plot our winter adventures 🎶❄️🏔️ 🌟 **Why now?** 🎭 Winter is when Zagreb slows. The days are cold and sometimes snowy, the city quieter, more reflective. It’s the season for winter walks, museums and cinemas, snow-dusted hikes on Sljeme, and simple pleasures like warm food and long conversations indoors.🌍💖💬 Zagreb is unusual in that winter can mean a mini ski break close to home. Sljeme offers easy slopes for beginners and casual skiers, without crowds or queues. Ice skating adds to the rhythm, outdoors at Šalata or indoors at Velesajam and the Admiral Ice Dome. ⛸️🎿 And the best way to share it? At **[SFIZ.FUN](https://sites.google.com/view/smallfridayinternationalzagreb)**. Our meetups are where plans get made, tips get swapped, and crews form to explore Zagreb together. 🌍💖 🍺 **Why The Beertija?** Because it’s that place everyone ends up wishing they’d gone to 😏✨ Warm beer cellar vibes 🍻🔥, cosy living-room energy 🛋️☕, 🚭 non-smoking inside (happy clothes, happy lungs 😌), plus a covered outdoor patio for quick smoke breaks 🚬😉. Skip it, and you’ll hear about it later 👀💬 💡 Top tip: Turn up early, smile, catch someone’s eye, and dive into conversation, that’s how the magic starts 😉💫 No pressure, just rock up and join the crew. 💖 Let’s ditch the screen, grab a drink, and meet the world! See you soon, **SFIZ Crew** P.S. Spread the word https://sites.google.com/view/smallfridayinternationalzagreb 🔎 **How to Spot Us** New here? Best trick is to swing by right at the start, that’s when it’s easiest to find the crew and jump straight in, or ask the bar staff about the event ✨ Need quick updates or can’t see us straight away? No worries, our [WhatsApp group](https://sites.google.com/view/smallfridayinternationalzagreb/faq/sfiz-whatsapp-guide-keeping-it-fun-and-respectful) is where you can ask quick questions. 💖 #ZagrebGlobalMingle 💖

**Autogenic training** is a method that, by directing attention to specific parts of the body and entering a state of deep relaxation, reconnects the brain with the body. By establishing communication between the brain and physical organs and body parts, we can positively influence our overall health. The **RDD Club** is organizing an **Autogenic Training session in Zagreb**, Maksimir, held in the hall at **Ružmarinka 15** (ground floor of the building). The training will take place on **February 13 and February 20, 2026**, both dates being **Fridays at 6:30 PM**. The session on **February 20** will be held as a **dual-language session**, in **Croatian and English**, so participants who do not understand Croatian are also welcome. **No prior registration is required.** The donation is **€15**.

Pojďme se pravidelně potkávat a sdílet zkušenosti z Power Platformy, co nás na ní baví, co nás trápí a co nového zajímavého přichází. A pokud už nám to někde reálně běží, pochlubme se, jak to funguje nebo nefunguje. Témata jsou primárně Power Automate, Power Apps, Power Pages, Power BI, Copilot Studio, Dynamics 365 a Dataverse. Budeme rádi i za méně pokročilé příspěvky, protože většinou jsme velmi hluboko v technických detailech. **Lokalita:** Fyzicky v Microsoftu v Praze Vyskočilova 1561/4a, Praha 4, 140 00 Místnost Morava Případně online na [https://ppug.community/stream](https://ppug.community/stream) **Jazyk:** čeština **Agenda:** [https://ppug.community/agenda](https://ppug.community/agenda) **Přihlašte vlastní příspěvek:** [https://ppug.community/sessions](https://ppug.community/sessions) **Link na stream:** [https://ppug.community/stream](https://ppug.community/stream) **Občerstvení:** Bagety **Úroveň:** 100-300 Tak si prosím naplánujte čas ve svých kalendářích a přijďte, pokud bude chuť a čas, tak si po meetupu určitě můžeme sednout na pivo.

Join us for a special Friday the 13th themed speed dating event catered to singles over 21 looking to mingle and make meaningful connections. Our Gothic-inspired venue sets the mood for a night of fun and excitement, giving you the chance to meet like-minded individuals in a relaxed and casual setting. Whether you're new to the dating scene or getting back out there after some time off, this event is perfect for anyone looking to meet new people and potentially find that special someone. Mixing elements of speed dating with a game night twist, this event promises to be a memorable and entertaining experience for all attendees. Enjoy Goth music playing in the background as you engage in quick and engaging conversations with other singles. Whether you're interested in seeking a new romance or simply expanding your social circle, this Speed Dating Night offers a unique opportunity to connect with others in a laid-back and welcoming atmosphere. Don't miss out on a chance to get lucky this Friday the 13th!

The Forge does have a full bar and kitchen. There is no cover charge but they do request all attendees to purchase a minimum of ~$20 per person. Soft drink refills are $1 each. Please support our hosts so we can continue to provide great events for the group! The Forge has a large library of games available for us to enjoy. Hosts and regulars will also provide numerous popular games but please bring any games you would like to teach and/or play. Doors open at 6, and we expect gaming to be rolling by around 630. Please promptly end your games and clear out the space at 10pm when the bar closes. We encourage socializing but do not permit disruptive behavior of any kind. Thank you for your continued commitment to providing a fun and welcoming space to veteran, newbie, and rookie gamers in the Columbus area. Parking can be challenging. There is a parking lot behind the neighboring Mexican restaurant that is free and easy to walk from but it's a bit hidden.

Let’s try MILO this week. Back to our old stomping ground COLUMBUS RECREATION CENTERS require membership fee to play. Register & Pay at the desk when you arrive. $5 day pass is available for first time players. I have some extra pickle ball paddles and balls if you don’t have one. Definitely bring your own paddle if you have one and bring some balls if you have them. Legal Stuff: The event hosts/Organizers are just fellow member volunteers. By participating in any event, you assume all risks of liability and injury inherent in these activities. You are responsible for your own safety and for determining if you are in condition fit to participate. You are also responsible for knowing and abiding by all laws and rules during your participation in any event.
 Photos & or Video: by attending these events you acknowledge photos and or video may be taken and used on this and other platforms.

As you may or may not know--I didn't until late last year--Aristotle wrote extensively on "friendship" in the Nicomachean Ethics. After 69 years the concept of friendship still creates questions and uncertainty. I had close friends in high school and for a few years after high school but our interests diverged and people moved all over the country so it was hard to maintain connections. * So if I/you haven't talked with a friend for several years, are you still friends? Are we friends who meet at Drunken Philosophy or Omnipresent Atheists? * Can you be friends with someone with whom you have virulently divergent political views? Sartre and Camus could not. * Aristotle regarded friendship as essential to a good life, not merely an added "bonus." Do you agree? * In the Nicomachean Ethics (Books VIII and IX), he claims that wealth and power are meaningless without friends. Trump has wealth and power but seems to have no real friends, but wealth and power seem meaningful to him in perverted ways. Can you have meaning in your life without friends? * Do men and women view and maintain friendships in different ways? * Aristotle categorizes friendship into three types, based on what forms the bond: * **Utility**: Based on mutual benefit, but this type is fragile and ends when the usefulness ceases. * **Pleasure**: Based on shared enjoyment (e.g., humor, hobbies). Common among youth but fades as interests change. * **Virtue (The "Complete" Friendship)**: Based on mutual respect for each other's character and goodness. You wish good for the other for their sake, not yours. * **Key Principles of "True" (Virtuous) Friendship:** * **Permanence**: Virtuous friendships last a lifetime whereas those based on utility and pleasure are fleeting. * **Reciprocity**: Requires mutual goodwill; secret or unreciprocated affection does not qualify. * **The "Second Self"**: A true friend is "another self"—their virtue helps you understand and improve yourself. * **Time and Intimacy**: Deep ("complete") friendships are few, built on time and shared experiences. * **Self-Love and Friendship:** * Good friendship starts with being a friend to yourself. * They distinguish shallow egoism (chasing honors) from real self-love (pursuing virtue). * A virtuous person’s pleasant self-company allows them to be a stable, good friend to others. * Aristotle argues that one's social circle ultimately reflects one's character—a view with striking relevance today. Well--the Drunken Philosophy social circle certainly reflects good character!

CABS Friday of our 1st Quarter Double Header 2/20 (We do one double header a quarter)

Welcome to Casual Boardgames, where we enjoy classic tabletop games and social deduction games while bonding over good food, drinks, and great conversations. 
We started this group to meet new people and make new friends, and bonding over games in a relaxed atmosphere is a great way to do that. We currently meet near route 23 and Polaris Parkway, and this is close to areas like Powell, Lewis Center, Worthington, and parts of Westerville and Columbus. 
Feel free to bring your own games or play one of the many games our members bring. If you are inexperienced, we will help you learn. 
Here are just a few examples of the kind of games we play. 
Tabletop/board games: Splendor, Catan, Azul, Dominion, 7 Wonders… 
Social deduction games: Code Names, Chameleon, Werewords… 
IMPORTANT: 
1. While we love playing a variety of games and competing, we are not just about the games. We interact and talk while playing, and this leads to a lot of laughter and fun. If you just want to compete and focus solely on the game, then this is probably not the group you are looking for. 
2. Many people join groups like this and never (or rarely) show up after weeks or months. If you join and never really come, we will eventually remove you from the group as a courtesy to our members. Why? Because limiting group conversations (on the app) to regular members makes communication and planning much easier. Also, while it may be rare, it protects members from people who join because they are interested in following a person instead of having a real interest in our group. If you get removed, it is just because you haven’t come, and we follow this protocol as a courtesy to our regular game players.