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(english/german below) **Bitcoin Pizza Dag!** Op 22 mei 2010 betaalde programmeur Laszlo Hanyecz 10.000 BTC voor twee pizza's — de eerste gedocumenteerde aankoop met bitcoin. Hij plaatste een bericht op een forum waarin hij BTC aanbood voor pizza; een andere gebruiker ging akkoord, bestelde de pizza's en leverde ze af. Die transactie werd later bekend als "Bitcoin Pizza Day". Laszlo bewees dat Bitcoin als ruilmiddel gebruikt kan worden. **Sluit je bij ons aan voor pizza-avond bij De Pizzabakkers! (vanaf 18:00)** RSVP zo snel mogelijk; we moeten reserveren bij De Pizzabakkers en er is beperkte plek. Zorg dat je je geladen Lightning-wallet meeneemt! *** **English: Bitcoin Pizza Day!** On May 22, 2010, programmer Laszlo Hanyecz paid 10,000 BTC for two pizzas — the first documented purchase using bitcoin. He posted on a forum offering BTC for pizza; another user accepted, ordering pizzas and delivering them. That trade later became famous as "Bitcoin Pizza Day," Laszlo proved that Bitcoin can be used as a medium of exchange. **Join us for pizza diner at De Pizzabakkers! (from 18:00)** Please RSVP as quick as possible as we need to make a reservation at De Pizzabakkers and there is only limited space. Be sure to bring your loaded lighting wallet along with you! *** **Deutsch: Bitcoin Pizza Tag!** Am 22. Mai 2010 zahlte Programmierer Laszlo Hanyecz 10.000 BTC für zwei Pizzen — der erste dokumentierte Kauf mit Bitcoin. Er postete in einem Forum und bot BTC für Pizza an; ein anderer Nutzer akzeptierte, bestellte die Pizzen und lieferte sie aus. Dieser Tausch wurde später als "Bitcoin Pizza Day" bekannt. Laszlo bewies, dass Bitcoin als Tauschmittel verwendet werden kann. **Begleite uns zum Pizza-Abend bei De Pizzabakkers! (ab 18:00)** Bitte antworte so schnell wie möglich; wir müssen bei De Pizzabakkers reservieren und es gibt nur begrenzten Platz. Nimm unbedingt deine geladene Lightning-Wallet mit!

We'll start into the weekend with some Sport and what is better than having a bike tour on Friday 22nd May? If you'd like to bike along, sign up here! We expect this to take about 4 to 5 hours. On the route, we will see at least two beautiful castles, and we’ll have a pause in Breukelen where we will get a snack! **This tour is for everyone. You don't have to prepare anything, it's enough to be at the bike rental at the time.** The following information is for the curious: You can see the [tour](https://www.komoot.com/de-de/tour/2884792439?share_token=aCVbZHeYrkmmS52GP5uwrR7Q3EweCrOv65hA2MpYgtf4nSaL8V&ref=wtd) on the app [Komoot](https://www.komoot.com/). It's approx. 46km, **we may adapt it as a group on the day. As last year we’re very flexible and adaptive!** The bike rental is payed by Stichting Rust Nederland. Many thanks to Erik Jonkers for the sponsoring and to Jana Dönszelman for helping with the meetup page and organization. **Agenda** 1. We'll meet at the bike [rental place](https://willemstraatbike.nl/contact/) it is near to the conference venue. (5 Minutes by bike) 2. Everyone receives their bike. 3. We’ll go over “Hogeweidebrücke” 4. We’ll see Kasteel Nijenrode and get a snack at the marketplace of Breukelen 5. We’ll see Schloss Zuylen 6. We ride back to Utrecht and return the bikes! Looking for more fun things to do during RustWeek? Take a look at our activities page: [https://2026.rustweek.org/events/social-activities/](https://2026.rustweek.org/events/social-activities/)

Discover Utrecht on foot with our friendly tour guides! This tour will take place at 10:00 AM on Friday, the 22nd of May, and will take one and a half hours (until 11:30 AM). There are 35 spots available. The tour is free of charge for RustWeek attendees. The tour starts at Kinepolis (the conference venue). Feel free to join our Discord at https://discord.gg/FSwaWZdk6k if you have questions! Our Discord and the RustWeek website, https://2026.rustweek.org/events/social-activities/, offer more activities.

**Speeddaten Utrecht** Al twaalf jaar organiseren we speeddates in Utrecht. Ontmoet je graag een groot aantal singles in korte tijd, dan is speeddaten iets voor jou! Tijdens een speeddate heb je ongeveer 15-20 dates van 4 minuten. Wanneer de bel klinkt, schuift de helft van de singles door naar de volgende tafel. Op je datekaart geef je aan met wie je verder in contact wilt komen. **Locatie** Het speeddaten vindt plaats bij [Anne&Max Domstraat](https://www.annemax.nl/vestigingen/utrechtdomstraat/), een sfeervol en ruim opgezet restaurant. We hebben een apart gedeelte van het restaurant gereserveerd, zodat je alle privacy hebt tijdens het daten. **Matchmail!** Binnen een dag na de speeddate ontvang je van ons een e-mail met de voornaam en het e-mailadres van de singles met wie je een match hebt. Heb je bij alle deelnemers ‘nee’ ingevuld? Dan is je volgende speeddate [gratis](https://aboutlove.nl/geen-klik-volgende-speeddate-gratis/)! **Kom je ook speeddaten bij About Love?** Heb je zin in een avond vol ontmoetingen in Utrecht? Schrijf je dan nu in voor deze speeddate! Bij About Love ben je in goede handen; wij zijn een ervaren speeddate-organisatie met uitstekende [recensies](https://aboutlove.nl/is-speeddaten-leuk/) en bieden speeddates aan voor de laagste prijs. Date je mee? >> [https://aboutlove.nl/event/details/speeddaten-utrecht-hogeropgeleid/](https://aboutlove.nl/event/details/speeddaten-utrecht-hogeropgeleid/)

**Please note: the new name of the bar is GOTO. On Google Maps it's still Bloemerbar.** **Join us for Maytime Drinks for Expats & Locals!** The days are getting longer, the weather is warming up, and it’s the perfect time to meet new people! ☀️ Join us for Maytime Drinks for Expats & Locals and enjoy a laid-back evening of great conversations, cultural exchange, and new friendships. **What to expect** * A lively and inclusive atmosphere to enjoy good company. * Conversations with a diverse mix of locals and internationals. * A laid-back evening of cultural exchange, friendships, and fun. **Who should join** * **Expats** looking to expand their social circle and make new friends. * **Locals** eager to share their culture and connect with an international crowd. * **Anyone** looking for a relaxed, social evening filled with great energy and good vibes. Don't miss out - **RSVP now** and join us for an unforgettable evening! Join the WhatsApp group: brand.page/expatslocalswhatsapp Follow us on Instagram: instagram.com/expats.locals Become a Welcomer: https://www.expatslocals.com/become-a-welcomer

*Since the guided meditations for this event are in Dutch, this description is too.* Wil je je drukke week afsluiten en ontspannen aan het weekend beginnen? Dan ben je geheel vrijblijvend welkom bij de vrijdagavond meditatie van [Jewel Heart](https://www.jewelheart.nl/). Deze meditatieavond heeft een licht en open karakter. De meditaties bestaan uit drie delen. We beginnen met het gewaarworden van je lichamelijke sensaties. In een korter deel twee doen we een loopmeditatie en in deel drie is er een eenvoudige, geleide visualisatie meditatie. Het geheel wordt afgesloten met een gesprek onder het genot van een kop thee, voor wie daar zin in heeft. 📍[Jewel Heart, Hatertseveldweg 284, Nijmegen](https://maps.app.goo.gl/D4FzqLbkaqs2JNDG8). Loop de oprit op en dan is de ingang aan je rechterzijde 🕒Zaal open vanaf 19.30 uur, meditatie van 20.00 tot 21.00 Je bent van harte welkom! Aan deze activiteit kun je per keer meedoen. Er zijn geen verplichtingen. Op vrijwillige basis kun je op de avond zelf een donatie doen. Kijk ook naar onze -[Open activiteiten](https://www.jewelheart.nl/nl/open-activiteiten/) -[Cursussen](https://www.jewelheart.nl/nl/cursussen-overzicht/)

[Get your tickets here!](https://ccu.stager.co/shop/default/events/111653443?utm_campaign=more-than-human-meetup&utm_source=meetup) Creative Coding Utrecht invites you to an evening of presentations and discussion on artistic and research projects at the intersection of AI, bioacoustics, and symbiotic relations. This meet-up explores more-than-human intelligences: how algorithms, birds, and other beings interact, communicate, and co-create. The event foregrounds the act of listening as a relational practice, one that spans species and technologies. **Presentations:** **BioacousticAI** This project develops deep learning methods for wildlife sound monitoring, enabling more precise and scalable assessments of animal populations. By analysing acoustic data, BioacousticAI contributes to biodiversity research and conservation efforts, offering new ways to “hear” ecosystems and their inhabitants. *Presented by Céline Angonin, a researcher and musician whose work bridges machine learning and bioacoustics, with a focus on the sonic dimensions of ecological systems.* **Chorusing Symbionts** An investigation into interspecies music, this project bridges humans, robots, and animals through ecoacoustics and embodied interaction. Inspired by AI and bioacoustic research, it proposes a form of “sensorial science-fiction,” where artificial creatures evolve in symbiotic relationship with their natural counterparts, blurring boundaries between organic and synthetic life. *Presented by Matteo Holyoke Marangoni, an artist whose practice integrates music, visual art, robotics, and new technologies to create immersive, multisensory environments.* **Vogelluisterstation** A sensor station that records, analyses and visualises bird sounds, making them accessible to both citizen scientists and professionals. The project aims to democratise ecological data, offering insights into local bird activity while lowering technical barriers to engagement with non-human worlds. *Presented by Niels Jansen, an artist, creative coder, and educator whose work explores digital improvisation in music, dance, and interactive installations.* **Program:** 19:30 - doors open 20:00 - presentations 20:45 - break 21:00 - Q&A 21:30 - informal drinks 22:00 - end event [Get your tickets here!](https://ccu.stager.co/shop/default/events/111653443?utm_campaign=more-than-human-meetup&utm_source=meetup)

Come along, lovely queer hikers! 🌿✨ This time we’re serving an easy-going queer nature moment with a short loop through **Landgoed Heidestein** near Zeist. Think dreamy forest paths, shimmering fens, a peaceful forest pond, and heather fields - a lot of diversity for such a short walk :) We’re teaming up with **Cocktail (COC’s group for LGBTQIA+ refugees & asylum seekers)** for this event, so besides soaking up nature, we’re creating space for connection, sharing stories, and learning from each other’s journeys and experiences. Expect a vibe that’s part hike, part picknick, part wholesome community exchange. 🌈 Bring your snacks and blankets, as we’ll pause along the way for a relaxed picnic moment together. Because queer joy isn’t just about where we go, but who we walk with. 💖 **Practical info** 📏 **Distance:** 5 or 7 km (loop walk) 📍 **Start:** Bus stop Prinses Margrietlaan, Zeist (5km option) Driebergen-Zeist station (7km option) 🏁 **End:** Back at the starting point 🥾 **Level:** easy - chill pace 🤝 **Meeting point:** outside the train station **Driebergen-Zeist at 13:45** or bus stop **Prinses Margrietlaan (Zeist) at 14:20** ❗You’re welcome to join from another direction. If you come by car you can park at P+R Driebergen-Zeist. Please note: we published this hike with Cocktail simultaneously, which is also why we lowered the participant number from Hiking Queer NL's side. Pack your: 🍱 snacks 🚰 water 🧥 rain coat/umbrella ☀️ sun screen 🏳️‍🌈 anything else you might need ❌ If you signed up and cannot make it in the end, please cancel your RSVP attendance so we know how many people will show up and someone else can take your place instead. 💗 A voluntary donation helps us to keep the Meetup group up and running :) you can either pay via a Tikkie or in cash after we finish the hike. *Hiking Queers Netherlands & Cocktail (COC)*

Welcome to the third edition of the Cafe Crawl series! 🥐☕ This time we're heading just outside the city center to explore the cafes of the Vaartsche Rijn area and further down in the south of Utrecht. We meet at Vaartsche Rijn station and from there we'll take a scenic walk along the canals and waterways of this quieter, lesser-known part of Utrecht, stopping at three carefully selected cafes along the way. At each stop we'll sit down, enjoy something to eat or drink, and get to know the people around us. You'll be put in small groups that switch a few times, so by the end you'll have had genuine conversations with a good mix of people. How it works: We walk, we discover, we eat something delicious, and we meet new people. The focus is on being in the moment, enjoying the city, and good company. ⚠️ If you're unsure whether you can make it, please free up your spot for someone else.

Maki-e is a traditional Japanese lacquer decoration technique. Techiniques are involved drawing pictures, patterns, and letters on the surface of lacquerware using lacquer, and then sprinkling and fixing metal powder, such as gold or silver, onto the surface. In our workshop, you have the opportunity to create maki-e designs using traditional Japanese patterns (wagara) or your own original designs. Then your canvas can be a glass cup or a glass picture frame. Join us for this unique Japanese art workshop in Utrecht. * Place: CLAY TO PLATE Biltstraat 55, 3572 AG, Utrecht * Price: three options you can choose from €56 pp(for a glass cup) €60 pp (for a glass picture frame) €76 pp (for a lacquerwares) Limited seats available. **Booking is essential for adequate preparations. If you've enrolled/registered on the Meetup app, we'll contact you through the app message. Kindly communicate with us accordingly, and refrain from showing up without prior contact. We appreciate your understanding** Website:[https://japanworkshopnet.com/ ](https://japanworkshopnet.com/) [MAKI-E workshop info](https://japanworkshopnet.com/maki-e-workshops/) Email: info@japanworkshopnet.com Mobile:0616059840

Join us for a relaxed and friendly matcha tasting meetup. I’ll bring matcha for everyone to try, and you’re welcome to bring your own snacks and drinks, including alcohol if you like. This is a casual event for meeting new people, enjoying Japanese tea culture, and spending a cozy afternoon together. Beginners are very welcome. Free to join.

**Modern and Authentic kintsugi workshop in Utrecht.** Choose from three options: * 1-Day Modern Kintsugi workshop-€60 * 2-Day Modern Kintsugi workshop-€96 * 4-Day Authentic Kintsugi workshop -€180 For all details, please visit my website. [https://japanworkshopnet.com/upcoming-workshops/](https://japanworkshopnet.com/upcoming-workshops/) Location: **CLAY TO PLATE** [Biltstraat 55, 3572 AG, Utrecht](https://www.claytoplate.com/) **Booking is essential**. Please contact me if you would like to participate in the workshop. Email: info@japanworkshopnet.com Mobile:0616059840

**Important time note:** Please plan on arriving between 5:30 and 6:00 as the elevators lock after 6 and you'll need to message us and we'll need to come get you. The building address is 4450 Bridge Park The entrance is 6620 Mooney St, Suite 400 You will need to scan your ID at the door to get a visitor badge. **Abstract** Like it or not, AI agents are now capable of turning a quickly written paragraph of requirements into a pull request that is ready to be integrated into real-world production applications and it's now our responsibility to make sure AI doesn't go rogue and take down prod - or corrupt our data by misunderstanding the requirements or our existing schemas. In this session we'll explore strategies to protect our codebases through unit and integration testing, documentation, and code review along with additional ways of providing context and guard rails to our AI agents as they carry out the work we've assigned them to do. By the time we're done, you'll have a firm grasp of the problem and understand some helpful options for protecting your codebase from vibe coding mishaps getting YOLOed into prod. **YouTube Link** TBD

Click Here For More Videos: https://www.facebook.com/share/r/17bwkttXhV/ *********************************** Salsamante Dance Academy will be at Swerve Every Tuesday Night to share the Rhythm & Energy of Bachata & Salsa. These are Beginner Level lessons to get you comfortable and understand the two dances. Spread the Good News to all. Swerve Dance & Fitness Complex 640 Lakeview Plaza Blvd A, Worthington, OH 43085 Bachata 7pm-8pm Salsa 8pm-9pm $15 - One Lesson $20 - Both Lessons

Our monthly PHP meetup. A virtual shindig courtesy of Zoom. Check back here for the details around 6:15 pm

Join Bold Spirit Travel for an all-women’s journey through the [heart of Provence. ](https://www.boldspirittravel.com/journeys-1/south-of-france-provence-2026) From charming villages and bustling markets, to lavender fields and coastal cliffs, this adventure blends history, art, food, and stunning landscapes. Your base is a boutique hotel in Aix-en-Provence, the perfect hub for exploring southern France. *\*We can only take 10 women on this trip.* **Highlights** * **Aix-en-Provence** – stroll cobbled streets, browse colorful markets, and enjoy lively cafés. * **Marseilles** – tour its historic basilica and meet traditional soap makers. * **Arles & Wine Tasting** – explore Roman ruins and sip wines at Mas Valériole estate. * **Lavender Fields** – capture the beauty of Abbaye Notre-Dame de Sénanque. * **Cassis & the Calanques** – enjoy seaside scenery and an optional boat ride. * **St. Rémy** – wander the vibrant market and visit Van Gogh’s former monastery. * **Les Baux-de-Provence** – experience the dazzling immersive light show. * **Cabrières-d’Avignon** – discover lavender’s artistry at the Lavender Museum. **What's Included:** * 6 nights in a boutique hotel (shared occupancy; private upgrades available). * Expert Bold Spirit tour leader plus bilingual local guides. * Meals as listed in the itinerary. * Private ground transportation. * Pre-trip support: Zoom call, WhatsApp group, and packing guidance. **Why Travel With Us?** This Provence adventure is designed for women who love travel, culture, and connection. You’ll share meals, explore iconic sites, and enjoy the slower pleasures of the French countryside—with expert guidance and community every step of the way. **Pricing:** * **Trip Cost:** USD 5,885 * **Deposit:** USD 700 non-refundable (secures hotels and guides) Get in touch with us to set up a call and learn [more](https://www.boldspirittravel.com/journeys-1/south-of-france-provence-2026). Contact:[ https://www.boldspirittravel.com/contact](https://www.boldspirittravel.com/contact)

Bring your work or your hobby, hang out, and code with us. Follow @buckeyecocoa for more information.

**Latest Dojo Location!** **Knotty Pine Brewing** 1765 W 3rd Ave, Columbus, OH 43212 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 speakers for our Monthly Meetups! Fill out the form if you are interested in presenting to the Python Community. https://forms.gle/ehSfUAC2WgR34Crq9

Join us for **[Nathan Leiberman](https://www.linkedin.com/in/nathan-richard-lieberman/)**'s talk ... Had enough of writing the same flex classes for the hundredth time? Tired of diving into your coworker’s cobbled container class? Tailwind CSS is here to save your sanity. Tailwind gives you a well-organized, utility-first approach to styling. This CSS framework eliminates naming debates, halts stylesheet scavenger hunts, and satisfies your marketing team’s whims with clear, composable class names and a powerful configuration system. You’ll spend less time fighting CSS and more time building beautiful interfaces. In this talk, I’ll walk through an interactive demo of Tailwind CSS and cover the following topics: * Set up Tailwind CSS in your project * Understand Tailwind’s utility classes and how they work * Integrate breakpoints and dark mode like a pro * Customizing Tailwind to fit your style Ditch your spaghetti stylesheets and come see how Tailwind CSS can make your project lighter, cleaner, and a lot more fun to build. Your future self will thank you. ***Bring your laptop and expect to write some (non-AI generated) code!*** Food and drinks will be available. **LOCATION:** 6515 Longshore Loop, Suite 300, Dublin, OH 43017 **FREE PARKING:** 6725 Longshore Street, Dublin, OH 43017