Half Marathon

**🚀 Join our free Budapest Data Science Meetup!** In the first talk, **Domokos Miklós Kelen from Mastercard** will dive into SHAP in practice, showing how **Shapley-based explanation methods are actually used in production systems**, from theory and architectural choices to real-world trade-offs when explaining black-box models. Next, **Gergely Daróczi, PhD** will present insights from benchmarking **2,500+ cloud server types across six providers**, sharing performance results from hundreds of DS/ML/AI workloads — including LLM serving — and revealing what really matters when choosing infrastructure for scalable, efficient inference. **📅 Date & venue:** * **29 January 2026, Thursday, from 6 pm** * **Mastercard Office 1132 Budapest, Váci út 26. · Budapest** **Please note that the event's official language is English!** **Schedule** **17:45 gates open** **17:45-18:15 Warmup and chit-chat** **18:15-19:30 Talks** **19:30 - 21:00 Drinks, snacks, networking** **Explaining Production Models: SHAP in Practice** Abstract: Since its publication, SHAP and other Shapley value-based explanation methods have become an industry standard for gaining insight into black-box models. However, there are many variants of SHAP, each with its own trade-offs. In this talk, we’ll discuss how explanation methods are used in our production system, covering the theory behind them, the system architecture, and practical considerations. **[Domokos Kelen](https://www.linkedin.com/in/domokos-kelen-08412371/)**, Lead Data Scientist at Ekata, a Mastercard company. Having completed his PhD in Machine Learning recently, he joined Mastercard in 2025 to work on building, improving, and explaining fraud detection models. **\-\-\-\-\-\-\-\-\-\-** **Benchmarking 2000+ Cloud Servers for DS/ML/AI Workloads** Abstract: Spare Cores is a Python-based open-source ecosystem collecting, generating, and standardizing comprehensive data on cloud server pricing and performance. We have evaluated over 2,500 server types across six cloud vendors to measure performance across \~500 workloads, including suitability for serving Large Language Models from 135M to 70B parameters. We tested how efficiently models can be loaded into the memory or VRAM, then measured inference speed across varying token lengths for prompt processing and text generation. The published data can help you find the optimal instance type for your LLM serving needs, and we will also share our experiences and challenges with the data collection, and lastly some insights into general performance patterns. **[Gergely Daroczi, PhD](https://www.linkedin.com/in/daroczig/),** is a passionate R/Python user and package developer for two decades. With over 15 years in the industry, he has expertise in data science, engineering, cloud infrastructure, and data operations across SaaS, fintech, adtech, and healthtech startups in California and Hungary, focusing on building scalable data platforms. Gergely maintains a dozen open-source R and Python projects and organizes a tech meetup with 1,800 members in Hungary – along with other open-source and data conferences. **Sponsors and partners** * **Ekata, a Mastercard company** * **Budapest Data Science Meetup**

The Men’s Circle of Excellence Gathering, for men who seek truth, mastery, and a life beyond mediocrity. The goal is simple: to support each other in mastering mind and spirit, breaking free from comfort, and moving toward excellence in every area of life. Modern life offers endless distractions but little real connection. Too often, men walk the path of self-development alone, or struggle against the negative pull of today’s society. The Men’s Circle of Excellence was created to change that: to bring support, accountability, challenge, and community energy. We gather in person to share openly, confront fears, and inspire one another to reach higher. Here, power is rooted in virtue, strength is balanced with empathy, and ambition is guided by wisdom. How it works: • Welcome & introductions: Meet new members and reconnect with familiar faces. • Open sharing: Each man speaks about his current challenges, fears, or obstacles. • Honest reflections: The group responds with insight and encouragement. • Connection Time: After the circle, we'll have extra time to relax, talk, and build friendships. Recommendation: • Before the event, take some time to think about your current situation and what to bring into the circle. Limited to max. 8 men per gathering to keep the space focused, personal, and meaningful. Confirm your attendance to reserve your spot.

A meetup most nem bitekről fog szólni, hanem arról, ami a bitek mögött van – az emberről, és arról a környezetről, amelyben dolgozunk. A hekkelés ugyanis csak addig etikus, amíg betartjuk a szabályokat és a törvények szabta kereteket. A mai alkalom címe: Ne légy hülye! – amely valahol a Hackersuli egyik nem hivatalos mottója is. Arról lesz szó, hogyan ne legyünk hülyék, milyen törvényi keretei vannak a kibertérnek, honnantól és miért beszélünk bűncselekményről, hol sértünk jogot (vagy éppen nem), egyáltalán milyen jogsértéseket tudunk elkövetni, illetve milyen jogi keretek között tudjuk legitim módon, kockázatmentesen végezni a munkánkat. Tényleg nem lesz hekkelés, de igyekezni fogok, hogy érthetően, nem csak a paragrafusokat, hanem a jog szellemiségét is bemutassam Nektek, illetve néhány kedves esetet körül járva elmélyítsük a jogérzékenységet.

Please sign up in advance! Hot Paprika Presents: Budapest’s Best Pub Quiz! Register here: https://forms.gle/JKjGn4aGBr1r1dF48 Join us for the Hot Paprika Pub Quiz at A&O Hostel Budapest, kicking off at 8 PM! This isn’t your average trivia night—it's hosted by comedians, so expect uncomfortable laughs, unexpected twists, and an unforgettable time! What to Expect: Diverse Topics – From pop culture to history, no subject is off-limits! Comedian Hosts – The hilarious Tauseef Parvez & Fanni Pinter will keep you entertained. Big Prizes – Weekly winners score free comedy show tickets & bar discounts . Grand Prize – The season’s top team wins a 20,000 HUF bar tab! First Event: Donation-Based – Come, play, and support the show however you can! Gather your team, sharpen your wits, and let’s make trivia night legendary! Register now and don’t miss out!

El objetivo de este encuentro es romper el hielo, hablar de las historias que nos gusta escribir, de por qué escribimos, de los libros que nos gusta leer, de qué dificultades encontramos al enfrentarnos al folio en blanco y de qué esperamos del grupo. En definitiva, se trata de conocernos como personas para entendernos como escritores. No importa si has escrito diez novelas, cuatro cuentos o el precioso título de un poema sin versos. Aquí todo aspirante a juntaletras es bienvenido.

Our regular guided meditation starts at 7.00 PM and the lecture will follow at 8.00 PM. Our event is free of charge. Please come at a bit earlier to be able to meet us and join the meditation in a relaxed way. 'The most powerful, smallest and largest thing in the universe is the mind' 16th Gyalwa Karmapa

A 2026-os év első Power BI és Fabric meetupjára különösen érdekes programmal várjuk a résztvevőket. Visszanézünk a meglehetősen mozgalmas tavalyi eseményeire, bemutatjuk az aktuális újdonságokat, és a Dashboard Baristák projekt kapcsán az AI alkalmazhatóságával is foglalkozunk. **Előadások** * **Power BI 2025 Recap** *A tavalyi év rengeteg változást hozott a Power BI ökoszisztémában, az új árazási modelltől kezdve a kódalapú formátumokon át az egyre többet tudó AI funkciókig. Az előadásban a legfontosabb* *eseményeket és változásokat foglaljuk össze.* * **Power BI és Fabric januári újdonságok** *Új funkciók, GA bejelentések, Data Visualization Championship* * **Dashboard Baristák 2025 beszámoló** *A 2025-ös BI Fórum egyik színfoltja volt a Dashboard Baristák projekt, ahol a résztvevők AI eszközök segítségével tervezhettek és generálhattak adatvizualizációkat és dashboardokat.* **Előadóink** * [Arató Bence](https://www.linkedin.com/in/bencearato/) \- Managing Director * [Lovas Yvette](https://www.linkedin.com/in/yvette-lovas-316b95ba/) \- Senior Business Intelligence Consultant * [Katona Kristóf](https://www.linkedin.com/in/katonakri/) \- Senior Business Intelligence Consultant 📅 **Időpont:** 2026\. január 29\. csütörtök 18:00\-20:00 📍 **Helyszín:** Budapest - Bókay János utca 44. - EPAM Rendezvénytér 🗣 **Nyelv:** Magyar **📝 Napirend** * 17:30 Ajtónyitás * 18:00 Előadások * 19:30 Kötetlen beszélgetés * 20:00 Meetup vége 🎉 A cateringet és a helyszínt ez alkalommal is az [EPAM](https://www.facebook.com/Epam.Hungary) biztosítja. 🔗 Csatlakozz hozzánk [LinkedIn oldalunkon](https://www.linkedin.com/company/budapest-power-bi-user-group) is. 🎥Felvétel nem készül az eseményről, csak személyes részvételre van lehetőség. *Information for international members:* *\- This is a Hungarian speaking event\.* *\- There will be no streaming or recording\.*

Join me to practice dynamic power yoga in Budapest! English-speaking classes held at [Sanctuary yoga studio](https://www.sanctuary.hu/). Every Friday at 6:30pm. Open to all levels. Move, Sweat & Connect. **Book your spot [here.](https://www.sanctuary.hu/booking-calendar/friday-power-yoga-18-30-en?referral=service_list_widget)** Location: Budapest, Bercsényi u. 5, 1111 Instagram: [theinner.drishti](https://www.instagram.com/theinner.drishti/)

**IMPORTANT: If you haven't already, please make an account on [budapestracketclub.com](https://budapestracketclub.com/), soon it will be our main platform for scheduling events. Thank you!** We’ve confirmed our reservations for three courts and we are all set for our upcoming badminton session! Here are the details: * **Date:** Saturday, 31 January 2026 * **Time:** 14:00 – 16:00 * **Location:** Tuskecsarnok –[ Google Maps](https://maps.app.goo.gl/urUMXA9WHcp3xJjb6) * *Note*: Navigating to this pin will take you directly to the ramp leading down to the entrance of the sports center. If you need help, reach out via WhatsApp or MeetUp! This will be a relaxed afternoon: open rallying on three available courts with players rotating into mixed doubles as numbers allow. No strict schedule—just come ready to play and meet fellow badmiton enthusiasts. **Skill Level** We welcome players of all skills, ages, and abilities. There are no level expectations, but be prepared to play with mostly beginner and intermediate players and adjust your expectations accordingly. The goal is to have fun and enjoy the game! **Need a Racket?** Loaner rackets are available; please reach out via WhatsApp or the comments if you’d like one set aside. **Costs** This will depend on the final number of attendees but please be prepared to pay **at most** 3,000 Ft per person for the court rental. We will confirm the final price on the day of. **Next steps:** 1. **Create an account on** [https://budapestracketclub.com/](https://budapestracketclub.com/) 2. **RSVP on MeetUp** so we can track attendance and confirm court numbers. 3. Arrive a few minutes early so we can sort out payments and start promptly at 14:00. 4. Spread the word—the larger our community, the sooner we can set up more recurring sessions, tournaments, and social events: * **Website:** [https://budapestracketclub.com/](https://budapestracketclub.com/) * **WhatsApp:** [https://chat.whatsapp.com/Dofz0CpQIpU5bNhcvbw0g9](https://chat.whatsapp.com/Dofz0CpQIpU5bNhcvbw0g9) * **Facebook Group:** [https://www.facebook.com/groups/budapestracketclub](https://www.facebook.com/groups/budapestracketclub) See you on the court!

Hello everyone, Take a break from your week to make progress on your reading in good company, then join a relaxed chat about what everyone's been reading. 🗓️ Schedule 14:00 \- 14:30 \| Arrive & Introduction round 14:30 \- 15:30 \| Silent Reading Hour 15:30 \- 16:30 \| Chat & Discussion 📍 How to Find Us **Napraforgó terem** (Sunflower Room). Look for signs throughout the building showing which room is where. Exact location details will be posted in the comments when we arrive. ✨ Voluntary Contributions Booking our own space costs \~15,000 HUF. We use a voluntary contribution model (suggested 500-1000 HUF per person, but completely optional). There'll be a Revolut QR code and cash box at the event. All funds go to the venue, with any extra covering Meetup costs. Whether you're a regular or first-timer, you're welcome. See you there! 📌 **[Goodreads](https://www.goodreads.com/group/show/1271292-budapest-silent-book-club)**[ ](https://www.goodreads.com/group/show/1271292-budapest-silent-book-club)(monthly book club voting) 📌 **[Facebook Page](https://www.facebook.com/people/Budapest-Silent-Book-Club/61567388151835)** (previous books read in sessions) 📌 **[Silent Book Club](https://silentbook.club/pages/about-us)** (the idea itself, where did it come from?) 📌 **[Contribution Tracker](https://docs.google.com/spreadsheets/d/1C_N9CN_pQO5aUYezqzQW4GS7pr8IfplchwG8-ruZ19g/edit?usp=sharing)** (spreadsheet for our private room experiment)

Join me to practice a Vinyasa Yoga Flow in Budapest! English-speaking classes held at [Hanuman yoga studio](https://www.hanumanjoga.hu/oratipusok/vinyasa-flow-yoga-nidra-in-english/). Every Saturday at 11:30am. Open to all levels. Flow, Feel & Stretch. **Book your spot [here.](https://www.hanumanjoga.hu/oratipusok/idopont-foglalas/)** Location: Budapest, Erőd u. 16, 1027 Instagram: [theinner.drishti](https://www.instagram.com/theinner.drishti/)

Hey everyone, here we go again with our next event on **Sunday**!. Leon will host and please follow his instruction. IMPORTANT NOTE: Free Cancellation is only until Saturday, 18:00. If you cancel after that without noticing the host, You must pay the fee to compensate the court and shuttlecock. Also note that due to Meetup Organizer Subscription fee is increased significantly, The on-duty host will add an extra fee based on the number of attendees. Please do not come if you are in the WAITLIST. Level of Expectation: Beginner - Intermediate. Please watch the video if you are first timer of playing Badminton : https://youtu.be/tAS7rOKtpgQ?si=IDm9UEV55nUzU5Oc Venue: Tüskecsarnok Sportscentre: 1117 Budapest, Hevesy György út, Sportscentre Map: http://tuskecsarnok.hu/wp-content/uploads/tuske-map-1-full.png Look for #7 on the map. More info in the "How to find us" section of the Meetup event. Our venue does not provide rackets, which means that you'll have to bring your own racket! Should you get lost, feel free to text me on Meetup. There are 3 courts booked for us for 1,5 hours from 12:00 till 13:30. Showers and changing rooms are available! Extra Note Attendance fee: We will divide the court fee by the number of people showing up. However, in certain circumstance, when the number of people cannot is less than and equal to 10, The Host deserve to contact the people who canceled after the time designated cancellation time. The expected fee is usually around 2500-3000 HUF per person. Payment is done at the court. or The host will reach you out via meetup chat. !!!Last but not least: if you have signed up but cannot make it for some reason, just take a minute to sign off, RSVP = no. This is to help those who are on the waiting list and want to play. The cancellation time with non-sick reason should be 18 hours before the session. In case you are not feeling well on the session day, please kindly contact the host via comment or privately message him/her with the direct message feature maximum 3 hours before the session starts. Looking forward to seeing you! cheers, Yoga Liability: The participation happens on own risk. There is no liability for any accidents, thefts or damages from the organizer.

Sétálj velem és elmélkedjünk az élet "nagy" kérdéseiről. Mert két fontos dolog van: együtt lenni és egyedül lenni. Nézzük meg, megy-e a kettő együtt!

Tickets: [https://cooltix.hu/event/696d20c7f00a48424d017a7c](https://cooltix.hu/event/696d20c7f00a48424d017a7c?fbclid=IwZXh0bgNhZW0CMTAAYnJpZBExZ0VPZHRMQ2xlSkV6ZmtuZ3NydGMGYXBwX2lkEDIyMjAzOTE3ODgyMDA4OTIAAR7aXJy08louZvrn4Pt2gftgJjJ0uJpnySmS2u8P4RjShP0wZJ78bUa9nGRc5A_aem_ct9YlSq6ZJ8tLXOcRQejeA) Hot Paprika Presents: Breaking Bad x Better Call Saul Pub Quiz Say My Name… and Lawyer Up! Date: 30th January \| Time: 8 PM \| Venue: A&O Hostel Think you can cook up the perfect answer? Know your Heisenberg from your Jimmy McGill, your blue meth from your Cinnabon? Join us for a high-stakes night of trivia celebrating Breaking Bad and Better Call Saul—where only the sharpest minds in Albuquerque will survive the quiz without calling Saul! What to Expect: Criminally Good Trivia – From RV cook sessions and cartel politics to courtroom chaos and Gus Fring’s calm menace, we’ll test your knowledge across all seasons of both legendary series Heisenberg-Level Prizes – Drinks, discounts, and other rewards worthy of a kingpin (or a very good lawyer) All Crews Welcome – Come solo or bring your cartel, law firm, or lab partners. No team? No worries—we’ll lawfully assign you one! Tickets: Early Bird: 2000 HUF (first 15 only) General Admission: 2500 HUF On the Spot: 2500 HUF After purchasing, we’ll contact you via email (no burner phones, no payphones) to collect your team name and details. Get ready for moral dilemmas, plot twists, and trivia so intense it’ll make you whisper “I am the one who knocks.” Better call your friends—this quiz is the danger.

**New Dojo Location!** **Draft Day Columbus** 1130 Dublin Road Columbus, OH 43215 We're going to try a new dojo location for a few weeks and see how it works Dojos are informal Python group study sessions where everyone interested in Python gathers to learn about Python, help others with Python, or just hang out. Everyone is welcome from Python beginners to experts. Bringing a laptop is encouraged (we'll have extension cords and power strips). If there's something you want to learn leave a comment on this invite so we can plan ahead. We're looking for topic suggestions and people interested in presenting at our monthly meetings. To this end we've set up a survey form at [https://docs.google.com/forms/d/15eBKF1nQQ2XS5gzD4rvhVRHMBEj7lJtHuA9wXupS3Uc](https://docs.google.com/forms/d/15eBKF1nQQ2XS5gzD4rvhVRHMBEj7lJtHuA9wXupS3Uc)

Topic details coming soon. AGENDA: 7:00pm - Opening announcements 7:10pm - Main Topic 7:50pm - Q&A

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 ).

Hi ladies. Let's hike the multi-purpose trail - approximately 4 miles. Meet in the Maple Grove Picnic area.