Decentralized Systems & Applications

🗓 **English Speaking Club — Wednesday Meetup at Stars Coffee (Butyrskiy Val, 10)** Want to practice your English, meet new people, and have some fun? *Join our English Speaking Club this Wednesday at 19:00 at Stars Coffee (ул. Бутырский Вал, 10)! ☕️* 💬 **What to Expect:** We meet in a **friendly atmosphere to chat 1-on-1 in English — every 15–20 minutes you’ll switch partners**, so you get to talk to many different people. **After that, we play some English board games** — it’s a great way to relax, laugh, and keep practicing naturally. 🎲✨ ⏳ **Duration:** *Around 2 hours total:* 🗣 *1.5 hours of chatting* ☕️ *5-min break* 🎯 *25 min of English games* 👥 **Who Can Join:** *Our club welcomes everyone from Intermediate to Advanced (B2–C2) levels. We’re here to practice and get better together.* 💵 **Price & Registration:** * 🇷🇺 **For locals:** *600₽ + a drink at the café* * **📱Sign up in advance** *via* [Telegram-bot](https://t.me/Payment_RealTalkEnglish_bot) * ✨ **If it’s your first time,** *you can pay at the meeting — welcome!* * 🌍 ***For foreigners: FREE entry — no sign-up required!*** ⚡️ **Club Rules:** * ***Speak English only.*** * ***Don’t “teach” or correct others unless they ask for help.*** * ***Be respectful and open-minded — we’re all here to connect and learn together.*** * ***Don’t impose your religious, political, or other personal views on others.*** * ***Please order a drink or snack to support the café that hosts us.*** ☕️ ✏️ **Questions?** *Don't hesitate to reach out to Kirill via* [WhatsApp ](https://wa.me/+79857387761) / [Telegram](https://t.me/RealTalkSpeakingClub). **💻 Stay connected:** [Our Telegram channel](https://t.me/RealTalk_english_speaking_club) [Our VK](https://vk.com/yourrealtalk)

**🗓 English Speaking Club — Saturday Meetup at Stars Coffee (Arbat, 19)** Want to practice your English, meet new people, and have some fun? **Join our English Speaking Club this Saturday at 15:00 at Stars Coffee (ул. Арбат, 19)! ☕️** 💬 **What to Expect:** We meet in a **friendly atmosphere to chat 1-on-1 in English — every 15–20 minutes you’ll switch partners**, so you get to talk to many different people. **After that, we play some English board games** — it’s a great way to relax, laugh, and keep practicing naturally. 🎲✨ ⏳ **Duration:** *Around 2.5 hours total:* *🗣 2 hours of chatting* *☕️ 5-min break* *🎯 25 min of English games* 👥 **Who Can Join:** *Our club welcomes everyone from Intermediate to Advanced (B2–C2) levels. We’re here to practice and get better together.* 💵 **Price & Registration:** * 🇷🇺 **For locals:** 600₽ *+ a drink at the café* * 📱 **Sign up in advance** *via* [Telegram-bot](https://t.me/Payment_RealTalkEnglish_bot) * ✨ **If it’s your first time**, *you can pay at the meeting — welcome!* * 🌍 ***For foreigners: FREE entry — no sign-up required!*** ⚡️ **Club Rules:** * ***Speak English only.*** * ***Don’t “teach” or correct others unless they ask for help.*** * ***Be respectful and open-minded — we’re all here to connect and learn together.*** * ***Don’t impose your religious, political, or other personal views on others.*** * ***Please order a drink or snack to support the café that hosts us.*** ☕️ ✏️ **Questions?** *Don't hesitate to reach out to Kirill via* [WhatsApp](https://wa.me/+79857387761) / [Telegram](https://t.me/RealTalkSpeakingClub). **💻 Stay connected:** [Our Telegram channel](https://t.me/RealTalk_english_speaking_club) [Our VK](https://vk.com/yourrealtalk)

🗓 **English Speaking Club — Wednesday Meetup at Stars Coffee (Butyrskiy Val, 10)** Want to practice your English, meet new people, and have some fun? *Join our English Speaking Club this Wednesday at 19:00 at Stars Coffee (ул. Бутырский Вал, 10)! ☕️* 💬 **What to Expect:** We meet in a **friendly atmosphere to chat 1-on-1 in English — every 15–20 minutes you’ll switch partners**, so you get to talk to many different people. **After that, we play some English board games** — it’s a great way to relax, laugh, and keep practicing naturally. 🎲✨ ⏳ **Duration:** *Around 2 hours total:* 🗣 *1.5 hours of chatting* ☕️ *5-min break* 🎯 *25 min of English games* 👥 **Who Can Join:** *Our club welcomes everyone from Intermediate to Advanced (B2–C2) levels. We’re here to practice and get better together.* 💵 **Price & Registration:** * 🇷🇺 **For locals:** *600₽ + a drink at the café* * **📱Sign up in advance** *via* [Telegram-bot](https://t.me/Payment_RealTalkEnglish_bot) * ✨ **If it’s your first time,** *you can pay at the meeting — welcome!* * 🌍 ***For foreigners: FREE entry — no sign-up required!*** ⚡️ **Club Rules:** * ***Speak English only.*** * ***Don’t “teach” or correct others unless they ask for help.*** * ***Be respectful and open-minded — we’re all here to connect and learn together.*** * ***Don’t impose your religious, political, or other personal views on others.*** * ***Please order a drink or snack to support the café that hosts us.*** ☕️ ✏️ **Questions?** *Don't hesitate to reach out to Kirill via* [WhatsApp ](https://wa.me/+79857387761) / [Telegram](https://t.me/RealTalkSpeakingClub). **💻 Stay connected:** [Our Telegram channel](https://t.me/RealTalk_english_speaking_club) [Our VK](https://vk.com/yourrealtalk)

🗓 **English Speaking Club — Sunday Meetup at Grabli (Pyatnitskaya Street, 27с1)** Want to practice your English, meet new people, and have some fun? *Join our English Speaking Club this Sunday at 15:00 at Grabli (Pyatnitskaya Street, 27с1)! ☕️* 💬 **What to Expect:** We meet in a **friendly atmosphere to chat 1-on-1 in English — every 15–20 minutes you’ll switch partners**, so you get to talk to many different people. **After that, we play some English board games** — it’s a great way to relax, laugh, and keep practicing naturally. 🎲✨ ⏳ **Duration:** *Around 2 hours total:* 🗣 *1.5 hours of chatting* ☕️ *5-min break* 🎯 *25 min of English games* 👥 **Who Can Join:** *Our club welcomes everyone from Intermediate to Advanced (B2–C2) levels. We’re here to practice and get better together.* 💵 **Price & Registration:** * 🇷🇺 **For locals: 600₽** *+ a drink at the café* * 📱 **Sign up in advance** *via* [Telegram-bot](https://t.me/Payment_RealTalkEnglish_bot) * ✨ **If it’s your first time**, *you can pay at the meeting — welcome!* * 🌍 ***For foreigners: FREE entry — no sign-up required!*** ⚡️ **Club Rules:** * ***Speak English only.*** * ***Don’t “teach” or correct others unless they ask for help.*** * ***Be respectful and open-minded — we’re all here to connect and learn together.*** * ***Don’t impose your religious, political, or other personal views on others.*** * ***Please order a drink or snack to support the café that hosts us.*** ☕️ ✏️ **Questions?** *Don't hesitate to reach out to Kirill via* [WhatsApp ](https://wa.me/+79857387761) / [Telegram](https://t.me/RealTalkSpeakingClub). **💻 Stay connected:** [Our Telegram channel](https://t.me/RealTalk_english_speaking_club) [Our VK](https://vk.com/yourrealtalk)

## **Columbus Bitcoin Meetup – Event** Join us for another great evening dedicated to Bitcoin, learning, and community. We will be gathering in the private room at Olentangy Brewery for an evening of conversation, education, and fellowship with fellow Bitcoiners. This special event will feature three guest speakers sharing insights from across the Bitcoin ecosystem. ### **Guest Speakers** **Lindsay Faust** Relationship Manager at River **Andrew Tilmann** CEO of the Midwest Bitcoin Summit **Carlos Estrada** Founder of Coin Vigilante In addition to speaking during the event, Andrew Tilmann will also be available for a meet and greet. This will be a great opportunity to ask questions about the upcoming Midwest Bitcoin Summit, taking place September 23 and 24 at the Columbus Convention Center. ### **Midwest Bitcoin Summit Discount** Early Bird pricing ends **April 1st**, but you can still save **21%** by using the promo code: **COLUMBUS** Use the link below to apply the discount: [https://tickets.midwestbtc.com/affiliate/columbusbitcoinmeetup/event/midwest-bitcoin-summit-2026/?promoCodeTask=apply&promoCodeInput=columbus](https://tickets.midwestbtc.com/affiliate/columbusbitcoinmeetup/event/midwest-bitcoin-summit-2026/?promoCodeTask=apply&promoCodeInput=columbus) ### **Event Details** This will be a three hour event, with speakers beginning just before 7:00 PM. There will be plenty of time afterward for networking, meeting new friends, and continuing the conversation. Food will be provided. We look forward to seeing you there! ***

Central Ohio Radio Enthusiasts—CORE—is an informal community for anyone enthusiastic or curious about radio—whether you're new to radio and want to learn or you've been tinkering for years and want to share. Ham radio operators, GMRS users, Meshtastic fans, software-defined radio nerds, makers, and technical and non-technical folks are all welcome. No experience required or expected. This month we have **WiFi HaLow: Introduction and Practical Use** with **Alex Barbur**. Details are are [core.radio](https://core.radio).

Pay attention! We’re delaying a week for those of you who may be on Spring break and/or celebrating the holiday. Ok, no pancakes, but waffles-a-plenty. Join the local UX and Digital Design community for a casual monthly breakfast. Look for us upstairs!

In this local meeting, you will discover knowledge that you can use to get over the past. The key to improving your personal motivation, self-confidence, and happiness is to get over your painful memories. When you become free of your past, you will be free from stress, anger, anxiety and depression. Studies show that negative emotions can affect your health. By being free of negative emotions, believe it or not, you will most likely even look younger, feel more energetic, and become healthier! Be sure to click on the red "Attend" button below to come to this local event. We look forward to seeing you there. This group is brought to you by the Dianetics and Scientology life improvement center.

The global Azure community is coming together again, and Columbus is officially on the map. View the session lineup and speakers at [Global Azure Columbus 2026](https://coazure.github.io/cbus-global-azure-2026/) On **Saturday, April 18, 2026**, the Azure Columbus Meetup, DevOps Meetup, and Code and Coffee Meetup are hosting our local edition of Global Azure 2026. This is a free, community-driven event packed with learning, networking, and all things Microsoft Azure. Whether you’re building modern cloud-native apps, experimenting with AI agents, deploying containers, automating infrastructure, or just beginning your Azure journey, this event is for you! **What to Expect** * Engaging technical sessions * Real-world Azure architecture & cloud-native patterns * AI, agents, automation, and modern DevOps * Food and drinks (because learning burns calories) * Time to connect with fellow engineers, architects, and cloud enthusiasts **Who Should Attend?** * Software engineers (any language, any stack) * Cloud architects * DevOps engineers * Data professionals * AI explorers * Platform builders * Anyone who loves solving hard problems with great tools If you build, deploy, automate, scale, monitor, or optimize in Azure, you’ll feel right at home. **Why Global Azure?** Global Azure is a worldwide community event where Azure user groups host learning sessions on the same day across the globe. It’s grassroots. It’s technical. It’s practical. And it’s powered by people who genuinely love sharing what they’ve learned. And yes, it’s free to attend!

The Fellowship of the Star Schema: Transforming OLTP Data for Power BI One does not simply build reports on OLTP data. Join us on an epic journey from the depths of raw, normalized tables to the shining halls of a well-modeled star schema fit for Power BI greatness. We will demystify the differences between OLTP and OLAP, walk through star schema vs snowflake (and why Power BI has a clear favorite), and show you the compression differences between normalized and columnar storage that will make you never look at an OLTP model the same way again. We will cover the different types of dimensions, when to use them, and how to handle Slowly Changing Dimensions without losing your mind. You will leave knowing exactly how to identify a bad model, how to convert OLTP data into a clean star schema, and how to forge relationships that rule them all. Whether you are a data wizard, a curious hobbit, or somewhere in between, your models will never be the same.