Bitcoin

London BitDevs is a community of Bitcoin enthusiasts and professionals interested in discussing and participating in the research and development of Bitcoin and related protocols. The topics will be announced shortly before the event on [https://londonbitdevs.org/](https://londonbitdevs.org/). If you have any topics you'd like to dive into, please leave a comment on the appropriate pull request on the [GitHub repo](https://github.com/londonbitdevs/londonbitdevs-website/pulls). This seminar is sponsored by [Ben Delo](https://twitter.com/bendelo). **Time and location** Doors open at 18:45 and we'll start at 19:00, so please arrive on time. If you arrive late, please message us on Meetup and we'll do our best to let you in - but no guarantees. The venue is located near Westminster. The exact location will be shared via Meetup with all attendees. Please double check [your notification settings](https://help.meetup.com/hc/en-us/articles/360002880511-Why-am-I-not-receiving-Meetup-emails-) to ensure you're receiving updates. **Rules** Please be reminded that the Socratic seminars are technical in nature, have a strict no-photo and no-video policy, and are conducted according to Chatham House rules.

**Hello There! And welcome to our June Gophers @ Meta event!** It's immensely exciting that we'll be visiting Meta for our June event, but with great big office comes great responsibility, so it is **CRITICAL THAT YOU HEED THESE ENTRY REQUIREMENTS!** * You MUST bring Government Issued Photo ID with you, matching the name with which you sign up to this event * You MUST complete the NDA that will be emailed to you in advance of the event, before arrival * You MUST be over 18 years old * You MUST NOT record when inside the venue * You MUST wear the lanyard provided to you on the night at all times And needless to say, if you satisfy all of those criteria and manage to make it through security without being tackled, you MUST have a lovely time otherwise you know I'll be giving you a hard stare. A massive thank you to Meta for hosting! See you all there! ==== 📓 **Agenda**📓 ===== (Certain timings and orders may be subject to change) **5:30pm onwards:** Sign-In, Food & Refreshments **6:55pm:** Introduction **7:00pm:** 🗣️ **Jon Bodner: Testing Go: From the Basics to synctest** Testing is fundamental to software engineering and as a language focused on software engineering, Go includes a wide variety of tools to ensure your code is working as expected. I’ll walk through the basics of testing in Go, and then cover some of the more advanced tools: benchmarking, fuzzing, and the new synctest package. **7:40pm:** Raffle and Break **8:00pm: 🗣️** **Oleg Obleukhov: Time @ Meta** Discover how Meta uses Go to build PTP and NTP - open-source, highly efficient time synchronization systems that achieve nanoseconds precision. **8:30pm:** Break **8:40pm: 🗣️** **Simon Emms: Failure Happens. Your Code Shouldn't Care** As Gophers, we expect our code to be retried, restarted and run more than once. The challenge is making that safe and maintainable without layers of defensive plumbing. Temporal lets us write reliable workflows in Go that automatically recover from crashes and restarts, while still looking and feeling like normal Go code. In this talk, I’ll explain how it works and prove it with a live demo that treats failure as just another code path. **9:10pm:** Raffle Winners! **9:30pm:** Pub / Socialize ==== 🎉 **Prizes & Discounts!** 🎉 ===== **JetBrains Raffle!** \- We have 3 free JetBrains Product licenses to give away to some of our lucky attendees\! **Ardan Labs Raffle!** \- We're giving away one course license for Ardan Labs' Ultimate Go Bundle\! **Manning Publications Raffle!** \- We're giving away 4 free Go e\-books\! **45% Manning Publications Discount** \- a massive discount provided by the fine people at Manning\! You can also support London Gophers Events by purchasing via our affiliate link [HERE](https://mng.bz/oKqM) \- Use Code "**LGMeetup45**" for 45% off! **GopherConUK Raffle!** \- We're giving away one free ticket\!\!\! **10% GopherConUK Discount** \- The lovely people over at GopherConUK have provided a discount code for [GopherConUK 2026](https://www.gophercon.co.uk/tickets)! At checkout, use code "**GCUK26LGM"** for 10% off! ==== 💡 **Priority Queue** 💡 ===== We reserve 20% of the attendee spots at our events for those who are underrepresented in tech. If they join the waitlist and there is a reserved spot open they will be bumped into going! These spots are reserved until the last Sunday before the event. How do we define underrepresented? We use public surveys done by the tech community such as the ones linked below. https://survey.stackoverflow.co/2022/#section-demographics https://www.jetbrains.com/lp/devecosystem-2022/#gender-and-development ==== [📢](https://emojipedia.org/loudspeaker/) **Become a Speaker!** [📢](https://emojipedia.org/loudspeaker/) ===== Have something to say? We want to listen! We are always looking for new speakers who want to share their adventures with Go and have mentors who can help. You can sign up to be a speaker here: https://gophers.london/apply ==== 🧳**Looking For a New Adventure?** 🧳 ===== On the Gophers Slack (https://gophers.slack.com) there is a **#london-jobs** channel where company and recruiters can post job opportunities. ==== [📞](https://emojipedia.org/telephone-receiver/) **How To Reach Us** [📞](https://emojipedia.org/telephone-receiver/) ===== **Email:** contact@gophers.london **Linkedin:** https://www.linkedin.com/company/london-gophers/ **Twitter / X:** https://x.com/LondonGophers **YouTube:** https://www.youtube.com/c/LondonGophers 📜 **All London Gophers events operate under the Go Community Code of Conduct** \- https://golang\.org/conduct * **Treat everyone with respect and kindness.** * **Be thoughtful in how you communicate.** * **Don’t be destructive or inflammatory.** **Please do not message members without their consent** If you encounter an issue, please mail contact@gophers.london or conduct@golang.org

**Bookable via our website ➡️** [https://www.thegoodlifecentre.co.uk/events/intro-to-woodwork-basic-wood-joints-74/](https://www.thegoodlifecentre.co.uk/events/intro-to-woodwork-basic-wood-joints-74/) ⋆⋆⋆ A beginner's course that goes straight to the heart of woodworking. This five-week evening course will focus on timeless variations of wood joints that can be used for an endless amount of woodwork projects. Develop your skills with a saw, chisel and plane so that you can measure and mark out your work, cut, fit and glue joints accurately, ensuring your woodwork is strong, durable and darn good-looking. Learn these classic wood joints while you hone your making ability, and set free your ideas for furniture, box-making and all things fabulous. During the course, you will learn the uses and advantages of each joint as you construct a framework of sample joints. This project is a classic learning method. The **half-lap joint** can be used to make frames for pictures, perimeter door frames for panel or glass doors, dust dividers in cabinets and in many other situations. Because the half-lap does not add any thickness to the pieces of wood being joined, there are virtually no limitations for using it. The **mitred half** lap is an elegant yet strong corner joint, with its diagonal cut constructed with an internal half lap, The **tee halving** is a versatile joint which is often used in internal cabinet frames and simple framing and bracing. The **half dovetail** is a very strong type of joint because of the way the ‘tails’ and ‘pins’ are shaped. This shape makes it difficult to pull the joint apart and virtually impossible when glue is added. This type of joint is used in box constructions such as draws, jewellery boxes, cabinets and other pieces of furniture where strength is required. All use of tools and materials included. Perfect for beginners.

**Location** 📌 [https://share.google/z6UqUHk5XZdzdaKyb](https://share.google/z6UqUHk5XZdzdaKyb) **WhatsApp** [https://chat.whatsapp.com/C3nCUUqARUcA7bctuETE1z?s=cl&p=a&mlu=0&amv=2About](https://chat.whatsapp.com/C3nCUUqARUcA7bctuETE1z?s=cl&p=a&mlu=0&amv=2About) **Ticket £ 9.50** [https://www.fusion-lifestyle.com/brockwell-lido/pricing/](https://www.fusion-lifestyle.com/brockwell-lido/pricing/) **About** : Escape the heat of the city let's chill out together in one of the most characteristic London Swimming pools **Dive into Local Lidos & PondsBrockwell Lido:** Just a short hop from SE22, this is the perfect spot for laps and soaking up the sun safely. Let's chill out at Brockwell Lido

Incredible campaigners, survivors of press abuse and advocates for higher press standards will join special guests **Hugh Grant and Tulisa** **(X-Factor/N-Dubz)** at the Better Media Rally next week in London. **NEW SPEAKERS INCLUDE:** Aidan Kelly, Benedict Rattigan, Charlotte Hennessy, Des Freedman, Emily Brothers, Lisa Moorish, Margaret Aspinall, Mark Cann, Paul Dadge, Paul Wragg, Richard Ayre, Rizwana Hamid, Sarah Berry-Valentine and a very special message from Steve Coogan. And more to come... **Britain's press is broken,** but we have a generational opportunity to fix it - and end more than a century of failure and abuse. **Join us from 15:00 to 17:00 on Wednesday 24 June, Central Hall, Westminster, Storey's Gate, London SW1H 9NH** for a rousing, back-to-back speaker rally to demand better media. Further speakers to be confirmed soon. BOOK YOUR FREE TICKETS HERE: https://www.eventbrite.co.uk/e/fix-the-press-demand-a-better-media-tickets-1991771667675

[TICKETS REQUIRED](https://btcpay.btc.aw/apps/rvvVwGSSSiJ7UgtzjmBdxy1Uq6a/pos) Global watch party for the Bitcoin only release of the Cannes and Global Globe winning Julian Assange documentary; The Six Billion Dollar Man. All welcome. Promotional activities related to altcoins not permitted. No unsolicited photography. Peace and love.

Pitch.london is a curated speed-networking event for founders, operators and serious builders. Short, structured conversations. Sharp prompts. Real chemistry, fast. The hardest problem in early-stage entrepreneurship is finding the right people. Most events leave it to chance. We don’t. The room is curated, the prompts are clear, and the format is built for high-signal encounters between people who are actually building something. In one evening, you can meet more relevant people than you might in months of random networking. Two formats. One room. Zero fluff. **01\. Founder matchmaking pitches** Sixty seconds to share who you are, what you’re building, and what would actually help right now. Whatever you’re looking for, the room is built to help you find it: people to build with, people to hire or be hired by, advisors and investors, or honest feedback on what you’re shipping. **02\. Group brainstorms** Small, time-boxed groups tackle a real challenge brought into the room. Bring a live problem you’re stuck on. Get five minds on it for ten minutes. Leave with new angles and next steps. **This room is for you if you’re:** * A founder seeking a co-founder * A founder seeking a first hire * An operator looking for a serious team to join * A technical builder open to commercial partners * A commercial builder open to technical partners * A second-time founder scoping the next thing * An angel investor close to the early-stage scene It’s probably not for you if you’re hunting for clients, selling services, or still working out what you’re looking for. **Run of show** * 17:30 to 18:00 Doors, drinks, soft start * 18:00 to 18:05 Welcome and the rules of the room * 18:05 to 18:35 Speed pitches: Round 1 * 18:35 to 19:15 Group brainstorms * 19:15 to 19:45 Speed pitches: Round 2 * 19:45 to 20:00 Open networking, then drinks at the citizenM Skybar **What’s included** Your £25 covers your seat in the room and a drink at the citizenM Skybar after the programme. **First 30 in get a seat**

**Welcome to StitchUp** – a welcoming social group that embraces individuals of all skill levels, providing a shared space for crafting in a social setting. **Bring your current project**, whether it's knitting, quilting, embroidery, or any other textile craft. Work on your project or piece while having a chat with us. Some people knit, some people mend or just join the conversations. If you are starting new, I’m sure we can give you tips, but generally this is not a class or workshop and you will have to bring your own materials. Also keep in mind that we sometimes don't have a table, so something that requires table space might be difficult to do. **Background** – StitchUp began among friends with a shared love for textile crafts, evolving into a thriving group with regular meetups. Unfortunately, the group faced a decline during the COVID-19 pandemic but we would now like to revive these regular meetings in a social, in-person setting.

**Location** 📌 [https://share.google/z6UqUHk5XZdzdaKyb](https://share.google/z6UqUHk5XZdzdaKyb) **WhatsApp** [https://chat.whatsapp.com/C3nCUUqARUcA7bctuETE1z?s=cl&p=a&mlu=0&amv=2About](https://chat.whatsapp.com/C3nCUUqARUcA7bctuETE1z?s=cl&p=a&mlu=0&amv=2About) **Ticket £ 9.50** [https://www.fusion-lifestyle.com/brockwell-lido/pricing/](https://www.fusion-lifestyle.com/brockwell-lido/pricing/) **About** : Escape the heat of the city let's chill out together in one of the most characteristic London Swimming pools **Dive into Local Lidos & PondsBrockwell Lido:** Just a short hop from SE22, this is the perfect spot for laps and soaking up the sun safely. Let's chill out at Brockwell Lido

*Sorry for the 2 month break but I had to deal with some family member health issues, but we are now back!!* **LOCATION - THE DAILY GROWLER -** **2812 Fishinger Rd, Upper Arlington, OH 43221** Over the years, we’ve heard two requests constantly: 1. A place that was quieter and possibly private. 2. “I wish they accepted Bitcoin.” We’ve finally found a solution to these requests with The Daily Growler. We’ll have access to their private room, and you’ll be able to pay your tab with Bitcoin. Join us for a fun and relaxed social event! Enjoy delicious food and drinks as we chat about the latest news in the Bitcoin world. Everyone is welcome, whether you're looking for guidance, have questions, or just want to meet like-minded people. These social evenings are a great opportunity to make new friends and enhance your experience at the larger events throughout the year. We look forward to seeing you there! PSA: If the attendee RSVP seems low, keep in mind that most of our attendees come from X and not [meetup.com.](http://meetup.com./) You are welcome to come and become a part of our online community. Recordings of past guest speakers are available on our YouTube channel [https://www.youtube.com/@columbusbitcoin](https://www.youtube.com/@columbusbitcoin)

*Sorry for the 2 month break but I had to deal with some family member health issues, but we are now back!!* **LOCATION - THE DAILY GROWLER -** **2812 Fishinger Rd, Upper Arlington, OH 43221** Over the years, we’ve heard two requests constantly: 1. A place that was quieter and possibly private. 2. “I wish they accepted Bitcoin.” We’ve finally found a solution to these requests with The Daily Growler. We’ll have access to their private room, and you’ll be able to pay your tab with Bitcoin. Join us for a fun and relaxed social event! Enjoy delicious food and drinks as we chat about the latest news in the Bitcoin world. Everyone is welcome, whether you're looking for guidance, have questions, or just want to meet like-minded people. These social evenings are a great opportunity to make new friends and enhance your experience at the larger events throughout the year. We look forward to seeing you there! PSA: If the attendee RSVP seems low, keep in mind that most of our attendees come from X and not [meetup.com.](http://meetup.com./) You are welcome to come and become a part of our online community. Recordings of past guest speakers are available on our YouTube channel [https://www.youtube.com/@columbusbitcoin](https://www.youtube.com/@columbusbitcoin)

http://photos2.meetupstatic.com/photos/event/2/a/9/6/600_348310902.jpeg Instructor - Crow, HPS Class fee is $30 at the door or approved exchange RSVP with Advance pay of $25 (discounted) by PayPal on the web or by contacting Enchanted Elements (614) 437-2642. Reservations made directly to Enchanted Elements will be added to the class list manually not online. Private Instruction ~ Closed to the Public ~ Initiated Members Only Please come prepared for ritual. Blessings ~ Crow

**Pagans on the Patio! Summer/Fall Series** A casual gathering the first Thursday of each month. Time to relax, meet new people, and reconnect with old friends. There is no charge for the event itself and all are welcome but there are a few guidelines: 1. **You are expected to purchase food and/or drink to compensate the Cantina and our server.** 2. **No soliciting. Do not bring samples of your wares or brochures of your services.** 3. **Please respect the spiritual and political views of others that are present. No disruption of the peace.** In case of inclement weather, we will find seating indoors. I hope to see you there. Blessed be! \~ Cynthia ❤️---

💰 **Build Passive Income with AI Ebooks – Masterclass** Build a passive publishing business with AI — from idea to income. ⚠️ Your spot is only held once you complete registration below. ### [🔗 SAVE YOUR SEAT](https://aiventurelab.org/product/AIEbookBusiness?city=Columbus&groupurlname=network-of-book-lovers-and-discussion-meetups&startgmtdatetime=2026-06-30T22:00:00Z) --- What's covered: - Publish across platforms for passive income - Format and list ebooks so they actually sell - Find profitable niches using AI research tools *One system. Recurring income.* ✍️

📊 **Profit from Predictions – Polymarket Strategy** Stop guessing on Polymarket. Learn the analytical system that generates real profit. ⚠️ Complete registration below — RSVP alone doesn't reserve your spot. ### [🔗 CLAIM YOUR SPOT](https://aiventurelab.org/product/Polymarket?city=Columbus&groupurlname=network-of-book-lovers-and-discussion-meetups&startgmtdatetime=2026-06-30T22:00:00Z) --- What you'll learn: - A systematic approach to forecasting outcomes - How to identify high-value markets before the crowd - Polymarket strategies that generate consistent daily profit *The forecasters who win have a system. Get yours.* 🎯

Our next much-awaited **COLUMBUS** meetup is **Tuesday June 30th from 7-10 pm EST at ACE OF CUPS**. Meet patients, cultivators, processors, dispensary managers/staff, physicians, home growers, educators, activists, nonprofits, artists, attorneys, business owners, writers, students, and supporters to network, share our knowledge, collaborate, support each other and make new ones! Hope you will be there too! Save the date and pass the word. **Please RSVP** so we know who is coming and how many to expect. Find us to say hi and we will introduce you to others. We should be easy to spot. (The happy-looking group wearing cool nametags! See photos from our past events.) Sign in, grab a name tag, start your own bar/food tab, meet old friends and make new ones! Everyone is welcome. SEE YOU THERE!