Decentralized Systems & Applications

Zaterdag, 17 januari 2026 – 10.00 – 17.00 uur AMSTERDAM Kosten: € 130,–, inclusief btw en lunch Facilitator: [Susanne Hazen](https://susannehazen.com/over/) Assistentie: Iris Pinkepank Taal: Nederlands We gaan deze dag werken met ons voorouderveld. We gaan healing **vragen** EN we gaan op zoek naar en ons verbinden met voorouders die ons kracht kunnen geven en ondersteuning kunnen bieden met de strubbelingen die we op ons levenspad tegenkomen. Aanmelden via: https://susannehazen.com/voorouderrituelen/

🎶 **La Cumbipeña – Tango Night** 💃🕺 📅 **Saturday\, January 17 \| 20:00–23:00** **📍 Café Averechts, Utrecht** **🎟 Donation-based** This edition invites us into the world of tango - a dance and music tradition rooted in life lived passionately, strong emotions, non-verbal communication and a bit (or lot?) of 'dramita' 😅. ✨ **Live music** by Pablo Mosteiro: an Argentine artist whose relationship with tango deepened after leaving Argentina, first in the US and now in the Netherlands. He shares both his own compositions and tango classics with great sensitivity and quality. 💫 **Tango basics workshop** guided by Yasmín Unfer, expressive dance teacher. This is not about memorizing steps, but about feeling, connecting, improvising and dancing according to each body’s possibilities. No previous experience needed - and if you have it, you may discover tango from a new angle. 😘 🎤 **Open Mic** later in the night to keep sharing music, folklore, cumbia and whatever wants to emerge. Come dance, listen, connect and celebrate together, the Cumbipeña way 🧉🎶 Everyone is welcome 💛 Lxs esperamos! 🔥

From the first steps, we enter what is truly my favourite forest in the Netherlands, located on the southern edge of the Veluwe. Unlike most Dutch landscapes, this area has real steep hills, rolling terrain, and a distinctly un-Dutch feeling, even though you are right in the heart of the country. In winter, quiet paths and pale light filtering through tall woodland along the Italian Road make the scenery especially striking. Halfway through the hike, we slow down for a cosy break at Castle Doorwerth. It is the perfect place to warm up with bites and drinks, enjoy the historic surroundings, and take a relaxed pause before continuing our walk. The route also passes the iconic Wodan Oaks. These ancient trees, estimated to be 400 to 600 years old, add a quiet sense of history and continuity to the landscape, which feels particularly powerful in winter when the forest is still, open, and calm. **📍When and where to meet?** We’ll meet at 10:50 at Wolfheze train station. https://maps.app.goo.gl/73ZsY4tHrmhBjF8HA ⏰ We **start walking a few minutes after meeting up** — we don’t wait for latecomers, as the forest calls and daylight is short this time of year. **🚗 Coming by car?** There is plenty and free parking next to the station. https://maps.app.goo.gl/6yR1resGumn1j4jq5 **⏸️ Planned Breaks** After 12 km: Lunch break at Castle Doorwerth https://maps.app.goo.gl/qLe6DfxL8C6mKrmZA **💸 Payment** Please pay as soon as you sign up: To keep things fair for everyone, if we don’t receive your payment within 48 hours, we will need to remove you from the participant list. If there’s a waiting list, this will happen sooner (in less than 48 hours). If that happens, no worries — you’re always welcome to sign up again if there’s space. 🌟 Early Bird Deal! Join now for just €4 — available for 3 days (72h). After that, the price will be €5. The Tikkie link has been removed as the event is now fully booked. If a spot becomes available due to a cancellation and you would like to take it, you can message me directly and I will share the Tikkie link with you. **👟 Good to know** * Refund policy: Cancellations are fully refundable up to 1 week before the event (This is Friday 9 January at 23h59). After this period, the fee becomes non-refundable. * Hike difficulty: Our hikes are moderately challenging. Please only join if you’re confident you can keep up with the group’s pace (5 km/ h)— it’s more fun for everyone when we can walk together without long waits. * If the pace is too challenging: We may kindly suggest you continue at your own pace. We’ll give you clear directions to the nearest bus or train so you can return comfortably. * At your own risk: You participate at your own risk, so please make sure you have appropriate insurance coverage for outdoor activities. * Payment note: With Tikkie we only see initials (e.g., J. Doe instead of John Doe). Please include your Meetup name in the payment note so we can match it easily. * Friends joining: If you bring a friend, make sure they also register and pay. * What to bring: Snacks, lunch, and water/ or hot thee/ coffee (depending on the hike distance). * Stay connected: Join our WhatsApp group to be the first to hear about future hikes — ask for the QR code during the hike. * T-shirts: Fairwear-certified organic cotton, eco-friendly inks — €25. Sustainable, odor-resistant, and perfect for hiking. Let us know your size and we’ll bring one for you.

BACK TO COFFEE ROOM AGAIN! Welcome to Appsterdam. Whether you are a seasoned programmer or learning to code Apps, wouldn’t it be cool to run by your challenge with another programmer when you get stuck? Or you have questions, or simply want to be in the environment of other like-minded friends while you work on your project? Welcome to Appsterdam. Bring your laptop and get feedback, encouragement and support, no matter what level you are at. Share and contribute. Get guidance. Feel good. All levels are welcome, so don’t be shy. In the future we plan to have break-out sessions where we will have short talks on valuable topics and also conduct mini-hackathons where all of us get to participate and learn together. Maike and Daniel are super committed to have an inspired group. We start at 9:30 and end at 11:30 sharp, so some a bit closer to 9:30 to make sure you get the help you desire. Just ask and maybe we can help you with: • Android Development • iOS Development • Flutter Development • C++ • JavaScript • Python • Rust • UX/UI Design (Adobe XD, Balsamiq, Keynote, Sketch, Figma)

A fun evening full of oooohh's and aaahhh’s and this is why: https://youtu.be/9Usnkt4mEvM It’s all about having fun, so don’t worry if this is your first or second time playing. We will help you and we always cheer every player to victory so everyone has a great experience. Pls be aware - paid event - read all information! I reserved 2 lanes for 1,5 hrs, so we play from 20.00 - 21.30 Since I have to pay in advance I ask anyone that joins to pay their part as well in advance. If you join the list for this event, please transfer 15 euros immediately or make someone on the waiting list happy by giving your spot to him or her. I will sent a tikkie or publish it in the comments. Your spot is only confirmed after payment. No pay. No play. Please note that there is no refund for cancellation, since I have reserved bowlinglanes and have to pay full price wheter we are with 10 people or 3 people. In case you can't make it, I suggest you find someone to take your spot and he or she pays you the money back. If someone on the waiting list takes your spot then a refund is possible. If someone takes your place, pls let me know in advance. Pls be on time. We start bowling at 8 pm sharp. So be there at least 15 minutes early since u need to change shoes and maybe want to get a drink at the bar. After the bowling we usually go to a café in the city for drinks but if u feel like going home this is ofcourse also okay.

Another week, another bootcamp! Lets go! All levels welcome. Last details are communicated through the Whatsapp group. Please sign up via the sign up form: https://forms.cloud.microsoft/Pages/ResponsePage.aspx?id=DQSIkWdsW0yxEjajBLZtrQAAAAAAAAAAAAMAAJ0-AkBUQVdTSUk2SzFGSUxJWlZLVFJDNUI3RTVLVi4u&origin=QRCode

Op 18 januari (ja, een zondag) organiseren de Nederlandse QGIS gebruikersgroep, Openstreetmap gebruikers en OSGeo weer de traditionele nieuwjaarsborrel. We heten iedereen deze middag welkom in de Kargadoor in Utrecht. Aanmelden graag via [onze Pretix aanmeldomgeving](https://pretix.eu/foss4gnl/nieuwjaar/). Toegang is gratis, maar we weten graag met hoeveel personen we rekening moeten houden... ook voor de borrelhappen! We heffen deze middag het glas op het mooie open nieuwe jaar, en geven ook een podium aan mensen die wat over hun open project willen vertellen. Er is een scherm beschikbaar, maar het idee is wel dat we het leuk en luchtig houden. Kort en snel werkt het beste in deze setting. Dus als je iets wil laten zien: super. Mail even aan [bestuur@osgeo.nl](mailto:bestuur@osgeo.nl), dan weten we welke verhalen we kunnen verwachten. Aanvang 14:00 Formele programma 15:00 Einde 17:30. Ter plekke kijken we wie er na afloop mee wil nog iets eten (eigen kosten).

⚠️ **IMPORTANT: You must sign up and buy a ticket here to attend:** [https://groupvibe.com/](https://groupvibe.com/) **This is a curated, small-group meetup make new friends in Utrecht.** Each meetup brings together 4–6 like-minded people for casual conversations over coffee. We use the Groupvibe platform to organize and ensure everyone’s a good fit. 👉 **To attend, you’ll need to complete registration via this link:** [https://groupvibe.com](https://groupvibe.com) Once you register, and **buy a ticket or become a Groupvibe member**, we’ll share the exact location and match you with your group. **Why this works:** \* Smaller groups make real conversations easier \* Matching helps avoid awkward dynamics **Note:** RSVPs here on Meetup don’t reflect total attendance. Many attendees register directly via our website. This meetup is organized by **Groupvibe**, a small team passionate about helping people form meaningful friendships offline.

**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 Instagram:[@japanworkshop.net_ ](https://www.instagram.com/japanworkshop.net_/)

Come and join us for an evening of Buddhist meditation with like-minded people. The doors open at 7:00 PM, and meditation begins promptly at 7:15 PM. The meditation will last between 30 to 40 minutes, followed by tea and biscuits for anyone who would like to stay and chat. On some evenings, there will also be a short Dharma talk to provide some Buddhist context. The meditation space is down at the canal. To get there, you can take the stairs down. The meditation is offered on a donation basis. See our [website](https://utrechtbuddhistcentre.nl/) for more information.

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 Instagram: [@japanworkshop.net_](https://instagram.com/japanworkshop.net_?igshid=YmMyMTA2M2Y=) Mobile:0616059840

**❄️ It’s snowing outside, and it’s the perfect time to warm up with paint!** **Kick off the year with our first winter workshop in a small group of five only— “Winter Landscape in Watercolours.”** **Join us for our first workshop of the year - “Winter Landscape in Watercolours.” This calm, winter-themed watercolour session is an invitation to slow down and paint simple with limited palette, peaceful winter scenes. We’ll focus on the wet-on-wet technique and a limited colour palette to capture soft light, misty skies, and quiet snowy landscapes.** **Workshop Details** **📅 Sunday, 18 January** **🕚 11:00 AM – 3:00 PM** **📍 Schepenbuurt, Utrecht** **💶 €75 (all artist grade materials included)** **✨ Early booking offer:** **Use the code SAVE15 to receive €15 off your ticket.** **🎟 Reserve your spot:** **[https://eventix.shop/jwj79yxy](https://eventix.shop/jwj79yxy)** **What We’ll Learn & Create** **During this workshop, you’ll create two winter paintings while learning how to:** * **Use wet-on-wet techniques for soft skies and snowy surfaces** * **Mix and pour diluted colours for natural tonal variation** * **Create grainy, foggy textures for a quiet winter mood** * **Work with a limited palette to keep compositions simple and balanced** **I’ll begin with a short demonstration, after which we’ll paint together at a relaxed, easy pace.** **Materials :** **All artist-grade materials are provided - just bring yourself.** **Refreshments** **Tea, coffee, and light snacks will be served. (Feel free to bring your own lunch during 15 min break)** **Parking** **Free street parking is available.** **Stay connected for future workshops:** **[https://www.instagram.com/rangartbypooja/](https://www.instagram.com/rangartbypooja/)** **[https://www.instagram.com/poojavermastudio/](https://www.instagram.com/poojavermastudio/)** **I am looking forward to starting the year creatively with you.** **Warmly,** **Pooja**  **email address - [poojavstudio@gmail.com](mailto:poojavstudio@gmail.com)**

**WE'RE MEETING IN A NEW PLACE!** **Bunk Hotel - Long table on the first floor** Join in for a morning of crafting & chatting over a drink. Just bring your own project and payment for drinks. Meet fellow crafting enthusiasts, whether it's knitting, crocheting, stitching, origami, or something more unique! We talk about our projects, exchange tipps, but also just get to know each other and enjoy a relaxed Sunday morning in good company. All ages, levels and crafts welcome! And don't be shy, we have newcomers most weeks! **We have limited space at the café, so if you've RSVPd and can't make it, please cancel as early as possible so another person can join!** We now also have a WhatsApp group, where we want to organise get-togethers and other events. Ask one of the organisers at the next Meetup you join for more information and access.

Gaming, AdTech, EdTech, Media Streaming, and FinTech are just a few of the workloads where high-availability cloud infrastructure matters. Whether you’re doing battle daily in one of these spaces or are just curious about ways to improve performance, meet us in Reston for an in-person discussion on bare metal cloud architecture. You’ll meet our product lead, James MacKenzie, who will walk through how modern bare metal serves as a control plane for hybrid and private cloud architectures. **What we will cover** * Ways to leverage bare metal, containers, and orchestration for better performance and predictable economics; * Real-world hybrid, disaster recovery, and data-intensive architectures; * Our approach to eliminating ingress and egress fees. **Who should attend** * Cloud architects and platform engineers; * DevOps professionals and infrastructure leads; * FinOps stakeholders managing data-heavy or hybrid workloads. **Why attend** This is a technical, architecture-first conversation. You will leave with a clearer understanding of high-availability cloud infrastructure and how organizations are scaling cost-effectively. Food and drinks will be provided. Space is limited to keep the discussion interactive.

# Happy Birthday, You’re Dead Written and Directed by Terry Smith Produced by Jerri Wiseman ***You are invited to a surprise birthday party for Candy Crush, a D-list actor. She’s the hottest ticket in town. But her birthday party isn’t the only surprise she will get tonight! Someone’s about to be murdered. Only you can prevent this from happening before it’s game over. To miss this would be a crime.*** January 24 at Ono Offshore in Chantilly (with dinner) ONO Offshore, 4515 Daly Drive, Suite N, Chantilly, VA 20151 5:30pm Doors and Beverage Tabs open 6:00pm Dinner starts 6:45pm Show starts There will be a 15-20-minute intermission. Tickets: $57 plus ticketing fee and sales tax includes the show, catered dinner and dessert by Odd BBQ. Menu: Choice of smoked pulled pork or smoked chicken thighs and bun. Assemble your own sandwich with choice of BBQ sauce. (A Beyond Brat will be available for those who select a Vegetarian/Vegan Meal.) Macaroni and cheese. Grilled Vegetables. Baked Beans. Cookies for dessert. Beverages are not included in the ticket price. Guests will be able to open a tab for the self-serve beer wall with 4 craft beer options from Ono Brewing Company. There will also be hard seltzer available for purchase in addition to assorted sodas, tea, and bottled water. ### **[Buy tickets for ONO Offshore.](https://www.stagecoachtc.com/happy-birthday-youre-dead/)** You must buy a ticket to attend. An RSVP here will not save you a seat. This venue sells out quickly!

In this talk, Sean Hoar will explore how AI assistants can accelerate different stages of software development. From idea generation and prototyping to coding, testing, and debugging, AI tools are transforming how developers work. He’ll provide practical examples of where AI can save time, reduce errors, and help teams focus on higher-level problem-solving. Attendees will leave with actionable strategies to integrate AI into their workflow and stay ahead in the evolving tech landscape.

You are invited to Heal and RELAX with doTERRA Essential Oils! You will receive one of two introductory applications: #1 The digestive, immune, and cardiovascular systems or #2 The musculoskeletal, immune, and respiratory systems Essential oils support the body in its healing work. Symphony of Cells (SOC) is a collection of 21 essential oil applications that target a different body system. Applying the oils to the back and the feet is selected because of the large number of nerve endings along the spine and on the bottom of the feet. Nourishing the nerve endings helps to feed all the organs and glands of the body. Essential oils are natural plant oils obtained from different parts of the plant and easily recognized and used by the body to help achieve balance and assist in cleansing of foreign substances. SOC was created by Boyd Truman, a DoTERRA Wellness advocate, to create physical, emotional and spiritual journey within the body. Receive a SOC Essential Oil Healing Experience Session. Please Note: The SOC Essential Oil Experience Session is by appointment only. Message by 8pm the day prior to the event to reserve a time slot. To schedule your session please contact Joyce at (703) 395-5151. Symphony of the CellsTM is a holistic approach to bring harmony physically, emotionally, and spiritually within the body. The applications incorporate pure, therapeutic-grade essential oils and utilize a layering technique.

Join us for another session of our study group as we dive into the fascinating world of Large Language Models (LLMs) using the book **Build a Large Language Model from Scratch** from Manning. In this session, we will finish **Chapter 7: Fine-tuning to follow instructions**. In the last session, we talked about how to prepare the dataset for instruction fine-tuning and in this session we will perform the fine-tuning and evaluate the model afterwards. This isn't just a lecture! Come ready to ask questions, share insights, and code along. Whether you're a beginner or have some experience, this is the perfect opportunity to build a strong foundation together. If you plan to work with the code on your own laptop during the session, try and set-up the environment ahead of time (https://github.com/rasbt/LLMs-from-scratch/tree/main/setup). We will be meeting at the North County Governmental Center this time that is across from the Reston public library.

This is our weekly training session. NOVA Jujutsu is a self-defense focused system incorporating Geri (Kicking), Atemi (Striking), Uke (Blocking), Tai Sabakai (Body Movement), Tai Hodoki (Escapes), Kansetsu Waza (Joint Locks), Nage Waza (Throwing), Shime Waza (Choking), Katame Waza (Grappling), Tantojutsu (Knife), Bojutsu (Bo), Kenjutsu (Sword), and Kata (Forms). Come on down to a class and see for yourself what this group has to offer. You will get a great workout! You will have an awesome learning experience! You will meet some good people! We look forward to meeting you. See you there. TAGS: japanese, martial arts, self-defense, jujutsu, jujitsu, juijitsu, bujutsu, defense, karate, koppo, kenjutsu, bojutsu, tantojutsu

## **1 Million Cups Loudoun Workshop: How AI Can Work for Your Business** **Wednesday\, January 28 \| 9:00 AM – 10:00 AM** **Venture X Loudoun – Ashburn** Artificial Intelligence is no longer just a buzzword — it’s a practical tool that businesses of all sizes can begin using today. Join **1 Million Cups Loudoun** for a special **workshop-style presentation** led by **Victor Meer of AI Prime** and **Jay Jay Billings of Band Gap AI**, designed to help entrepreneurs understand how AI can realistically support their business operations. This workshop will provide: * A clear, practical overview of what AI actually is * Real-world examples of how businesses are using AI today * Insight into where automation can save time and reduce friction * Guidance on how to start leveraging AI without needing technical expertise Whether you’re AI-curious, overwhelmed by the noise, or ready to explore automation in your business, this session will help you think clearly about where AI fits — and where it doesn’t. As always, coffee, conversation, and community are at the heart of 1 Million Cups Loudoun. ### What Is 1 Million Cups? 1 Million Cups is a national program powered by the Kauffman Foundation that brings together entrepreneurs and community members for weekly conversations that educate, support, and inspire. Loudoun’s chapter meets on the 2nd and 4th Wednesdays of each month. Join us on **January 14 at 9:00 AM** for coffee, connection, and a meaningful conversation about reimagining after-school education in Loudoun County. **We look forward to seeing you there.**