Cryptography

Two hour activity session for children aged 6-11 **£30 CASH PER CHILD** - **payable on the door.** BITCOIN DISCOUNT [HERE ](https://btcpay.btc.aw/apps/rvvVwGSSSiJ7UgtzjmBdxy1Uq6a/pos) Come along to Cyphermunk House for a special holiday session for CYPHERTOTS to get interactive with Bitcoin fundamentals like proof of work and the timechain through real world activites and games. For ages 6-11. All welcome.

Registration Portal: [Event Registration Portal](https://luma.com/cclondon26?utm_source=sherif) About Event ​"Why are there no coffeeshops open late? But what if I want to co-work at night?!?" - everyone on Twitter ​Cerebras is excited to present, Cafe Compute. The first, late-night pop-up coffeeshop with a barista bar ☕️, cozy snacks and couches 🛋️, and more. ​​​​​​This event is brought to you in collaboration with OpenAI. ​​Cerebras is the world’s fastest AI inference, up to 15x faster than leading GPUs. Cerebras Inference is powered by our Wafer-Scale Engine (WSE-3) - the world's largest AI chip. Experience the speed for yourself with OpenAI Codex-Spark, powered on Cerebras, and get free compute at cerebras.ai. Location Please register to see the exact location of this event.

**Venue:** Riverbank House, 2 Swan Ln, London EC4R 3AD **Please note:** 1\. 🚨🚨🚨 A valid photo ID is required by building security\. 🚨🚨🚨 2\. This event follows the [NumFOCUS Code of Conduct](https://numfocus.org/code-of-conduct). Please familiarise yourself with it before attending. If your RSVP status says "You're going" you will be able to get in. No need to show your RSVP confirmation when signing in. If you can no longer make it, please unRSVP as soon as possible. **Code of Conduct:** This event follows the NumFOCUS Code of Conduct. Please get in touch with the organisers with any questions or concerns. As always, there will be free food and drinks, generously provided by our host, Man Group. **Main Talks** 1. **[Nicoleta Lazar](https://www.linkedin.com/in/nicoleta-lazar-921a6864/) Query federation in modern OLAP databases** As analytics ecosystems grow more diverse, organisations increasingly need to query data across warehouses, data lakes, and operational systems without excessive data movement or duplication. **Query federation** has become essential by enabling unified SQL access and intelligent predicate pushdown into heterogeneous sources. This talk introduces the core principles of federation and why it matters for modern OLAP workloads. Using StarRocks as a model system, we highlight its vectorised execution engine, native connectors, and deep Apache Iceberg integration that together deliver high-performance lakehouse querying. 2. [Ben Guerin](https://www.linkedin.com/in/bjhguerin/) **How I Learned to Stop Worrying and Let Claude Code Write the Python [the story of [ismypubfucked.com](http://ismypubfucked.com/ "http://ismypubfucked.com")]** 43,000 pubs. Official VOA data. One question. [ismypubfucked.com](http://ismypubfucked.com/ "http://ismypubfucked.com") got 400k visits in two weeks and wall-to-wall media coverage: from the Mirror to the Telegraph to City AM. I'm not a Python developer. I used Claude Code to wrangle government spreadsheets, match them to OpenStreetMap, and ship a working site. All in less than 6 hours from initial idea to a live website. The AI wrote the Python, I just knew what story the data could tell. This talk covers what happens when tools like Claude Code unlock Python for people who think in narratives rather than syntax, and what a decade of building viral campaigns has taught me about making people actually give a shit about spreadsheets. **Lightning Talks** 1. **TBC** 2. **TBC** \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- **Logistics** Doors open at **6.30 pm** (get there early as you'll need to sign in with building security). Talks start at **7:00 pm**, with drinks afterwards from **9:00 pm** at The Banker (EC4). We have reduced capacity for this event, but there will be plenty of people to discuss data science questions with. Please unRSVP in good time if you realise you can't make it. We're limited by building security on the number of attendees, so please free up your place for your fellow community members. If you want me to trim lightning talks down to two or shorten any abstracts, say which ones.

**Welcome to Networx London!** Calling all graphic designers, digital creatives, and startup founders: join us for an evening of relaxed networking and idea-sharing. Connect with like-minded innovators, creative professionals, brand owners, and investors—no formal pitches, just real conversations. We start at **6:30 PM** with a warm welcome and light icebreakers to get conversations flowing, followed by **open networking all evening**. No formal pitches just real connections, fresh ideas, and meaningful relationships in a friendly, laid-back setting. 👉 **Join us on Luma for deeper connections and connect before the event even starts** [https://luma.com/ntl](https://luma.com/ntl) 📍 **Venue: The Sycamore, Holborn** Located in the heart of London’s vibrant Holborn district, The Sycamore offers a modern and stylish setting with a relaxed, welcoming atmosphere—perfect for networking and socializing after work. Just steps from Holborn station, and easily reachable from Covent Garden, it provides an ideal environment for professionals to connect, share ideas, and enjoy great conversations over drinks. Come join us, grab a drink, and grow your network—one meaningful conversation at a time. 📅 **Event Schedule** **18:30 – 19:00 \| Welcome** Kick off with a warm intro and fun icebreakers to set the tone. **19:00 – 19:30 \| Meet & Greet** Mingle and network in an open, friendly setting. **19:30 – 21:30 \| Informal Networking** Free-flowing, informal networking all evening—no sales, no pressure. Just authentic connections with amazing people. **Why Attend?** 🤝 Connect with designers, digital creatives, startup founders, and professionals across London. 🚀 Discover new collaborators, partners, or clients. 📈 Learn about the latest trends in graphic design, digital creativity, and innovative startup solutions. This event is perfect for anyone seeking to expand their creative network, grow their business, or gain fresh perspectives from a dynamic mix of professionals. 👥 **Who’s coming?** This event is ideal for graphic designers, digital creatives, startup founders, brand owners, marketers, investors, product managers, and anyone curious about the future of design, creativity, and digital innovation. **🎟 Tickets & Entry:** To avoid the venue getting overcrowded and ensure everyone enjoys an amazing night, we've introduced a small ticket price to keep things running smoothly. **Limited spots!** Register today and hit **Follow** for updates on future weekly events. 📸 **Event Photography** Please note that photos and videos may be taken for promotional purposes. **Note**: Proof of ID required for alcoholic beverages. 18+ only. 🔗 \*\*Join our WhatsApp group to connect before and after the event:\*\*👉 [https://chat.whatsapp.com/GisOCaIiMeKEehV5Lv7qxg](https://chat.whatsapp.com/GisOCaIiMeKEehV5Lv7qxg "https://chat.whatsapp.com/GisOCaIiMeKEehV5Lv7qxg")

**A software engineers guide to LLMs** In this talk Richard Conway will break down what LLMs are layer by layer, how they work, how they use software principles to work and how to use them in software. This will be a fluid talk with a lot of philosophy, maths from school and how to build your software understanding things like hallucinations and new techniques that can make your management of LLMs more deterministic. We'll consider a lot of things here including the new code generation tools which have developers quivering in their boots, what they mean for our industry and how to use them for effect. Lots of mini-demos and great discussions, good people, beer and pizza! **About the speaker** Richard Conway co-founded the user group, along with Andy Cross, Joe Hancock and Chris Parsons. He is a Microsoft AI MVP and a Microsoft Regional Director and has been writing software in one form or another since his fingers were large enough to hit a ZX81 keyboard.

**Let's Shoot Noir Street Photography in Covent Garden London After Dark** This mini-workshop event focuses on shooting street photography after dark. You will learn tips for low-light shooting, handheld techniques, and how to creatively use existing city lighting. Covent Garden after dark has a unique energy. Street lamps, shop windows, neon signs, and passing traffic create natural contrast, cinematic tones, and deep, moody shadows. Certain areas have a real noir vibe, with back streets and alleys perfect for silhouettes and atmospheric street portrait shots. The location itself becomes part of your frame, adding depth and story without the need for a flash. This session focuses on capturing moody, creatively-lit street photography using the city’s existing lights. Occasionally, a model will be present as a point of focus to help you practice shooting subjects in varied real-world night-light conditions. *** **What You Will Learn** * **Reading Available Light:** Observe neon signage, street lamps, traffic, and reflections and use them creatively in your shots. * **Handheld Night Shooting:** Adjust ISO, shutter speed, and aperture for sharp, well-exposed images while shooting handheld. * **Creative Use of Light on Subjects:** Learn how to make people stand out using the available neon and street lighting. * **Exposure and Mood Control:** Balance highlights, shadows, and neon to capture the “noir” atmosphere. * **Quick Observation & Reaction:** Train your eye to spot photo opportunities in challenging night conditions. * **Getting to Know Your Kit:** Understand what your camera and lenses can do in low light so you can react confidently. *** **What to Bring** * **Camera Kit:** A lens around 35–50 mm is ideal—wide enough for street scenes, close enough for portraits of the model. A fast (prime) lens with a wide **aperture** (f/1.4–f/2.8) is recommended to help you shoot at night. You’re also welcome to use a smartphone. This workshop focuses on helping beginners master camera settings in varied night conditions. * **Essentials:** Cleared memory card and fully charged batteries. Extra batteries recommended. * **Travel Light:** Comfortable shoes & clothing suited to the weather. *** **Event Info** * **Duration:** 2 hours * **Group Size:** Max 5 * **Meeting Location:** Covent Garden, London *** **PAYMENT OPTIONS** * RSVP via Meetup (standard fee applies) * Or send £25 via PayPal to **street@lindawisdomphotography.com** — no extra fee * Message me to confirm your spot & I will add you to attendee list. \*\*\* **Bonus for Members** * **FREE DOWNLOAD – Beginner Street Photography Tip Sheets:** Master Night Street Photography For Beginners Tip Sheet covering the key topics from this event. You will receive a download link to follow along during the session. * **FACEBOOK COMMUNITY GROUP:** A private group for Meetup members to showcase their best work, receive critique, advice, and tips.

Gordon Parks was a ground-breaking photographer, filmmaker, author, and composer. You do not want to miss this very important and extraordinary FREE exhibition! The exhibition underscores Parks’ famous philosophy of using his camera as a weapon to fight injustice. Rather than focusing solely on victimization, the curated photos emphasize the strength, beauty, and humanity of the subjects. The plan is to meet at Waterstones in the cafe on the lower ground floor - then head to see the exhibition before heading out to do some street photography. WHAT YOU WILL LEARN * Street photography tips and techniques * Posing or candid * Photographers rights We will have a series of exercises to help you hone your eye for street photography. EQUIPMENT: * Any camera * 50mm F1.8 is recommended * A lens with a fast aperture (f1.8-f2.8) OTHER ESSENTIALS * A fun and experimental attitude! PAYMENT OPTIONS * PayPal via RSVP - Meetup transaction fee will be added. and you'll automatically be added to attend * Send £25 via PayPal to \*\*[creativebeansproductions@gmail.com**](http://creativebeansproductions@gmail.com%2A%2A/) with no extra fee. * Text Alex on 07956264049 and we will add you to the event attendee list. TRAVEL * As usual check TFL website for any issues that may delay your journey. CONTACT Alex 07956 264049 **VENICE PHOTOGRAPHY WEEKEND - Oct 2026** [https://www.meetup.com/londonphotographic/events/313109100/](https://www.meetup.com/londonphotographic/events/313109100/) **UPCOMING EVENTS** [www.meetup.com/londonphotographic/events](https://www.meetup.com/londonphotographic/events) Photo ©Gordon Parks

High tech discussions at the edge of Bitcoin innovation **[TICKETS HERE](https://btcpay.btc.aw/apps/rvvVwGSSSiJ7UgtzjmBdxy1Uq6a/pos "https://btcpay.btc.aw/apps/rvvVwGSSSiJ7UgtzjmBdxy1Uq6a/pos")** Antoine Riard discusses Ark. Technical knowledge advised, all levels welcome. Promotional activities related to shitcoins not permitted. No unsolicited photograhy. Peace and love.

Antoine Riard is, among other things, a contributor to both Bitcoin Core and the Lightning Network. In this event, he will share his expertise and knowledge about Ark: a technology that aims to help address some of Bitcoin's known limitations at scale. He will share its benefits, tradeoffs and his opinions. Don't miss this event, hosted at Cyphermunk House! Location: **9 John Street, Holborn, London, WC1N 2ES** Date: Wednesday 8th April 2026 Time: 18:30 Find more info and purchase a ticket (first timers are free) here: https://www.cyphermunkhouse.com/events

**Develop Your Eye for Everyday Street Scenes** **– Central London** This mini-workshop is all about observing and capturing the fleeting moments and unpredictability of people on the streets. You will learn how to anticipate, spot, and photograph fleeting moments. These unscripted interactions are the heart of street photography. Having shot the streets for 16 years, I know what makes a moment compelling. The challenge—and the skill—is seeing what others don’t. Through practical, creative challenges I give during the session, you’ll start training your eye to notice gestures, expressions, and interactions that often go unnoticed, helping you capture candid, real-life stories as they unfold. By the end of this workshop, you’ll begin to see and photograph these fleeting moments and interactions that can make street photography compelling, and you’ll understand how, with practice, your eye will start spotting these moments instinctively. **What You Will Learn** * **Observing People & Interactions:** Learn to develop your eye and recognise photo-worthy moments. * **Being Discreet:** Learn techniques to take non-intrusive candid shots. * **Timing & Decisive Moments:** Learn to anticipate the right moment to press the shutter. * **Quick Reaction Skills:** Develop instincts to notice fleeting moments that make images compelling. * **Understanding Your Camera:** Get guidance to adjust settings quickly and react to changing scenes. *** **What to Bring** * **Camera Kit:** Any camera works—DSLR, mirrorless, or smartphone. Any zoom or prime lens can be used. 24 mm and 75 mm is ideal for capturing street portraits and candid moments. *** **Event Info** * **Duration:** 2 hours * **Group Size:** Max 5 * **Meeting Location:** Central London, exact spot provided after booking *** **PAYMENT OPTIONS** * RSVP via Meetup (standard fee applies) * Or send £25 via PayPal to **street@lindawisdomphotography.com** — no extra fee * Message me to confirm your spot & I will add you to attendee list. \*\*\* **Bonus for Members** * **FREE DOWNLOAD – Beginner Street Photography Tip Sheets:** Covering the key topics from this session. * **FACEBOOK COMMUNITY GROUP:** Private group for Meetup members to showcase their work, receive critique, advice, and tips.

Elixir London Meetup; February 2026 edition. All are welcome. **Session 1: Anton Borisov - Distilling Kafka's Binary Protocol into Elixir** We'll trace a produce request to show what any Kafka client has to get right. In the BEAM ecosystem, erlkaf wraps librdkafka, brod implements the protocol in Erlang, and [kafka_ex](https://hex.pm/packages/kafka_ex) goes pure Elixir. Kafka_ex's approach is to generate serializers at compile time from Kafka's own schema definitions: plain structs, pattern matching, structural boilerplate isolated from the logic you actually think about. That design is what let us jump two major versions ahead and adapt to significant protocol changes. Let's dig into the idea, the code, and the tradeoffs. **Session 2: Evadne Wu** **\- JavaScript Execution Strategies in Elixir\-based Agent Frameworks** We'll look at integration points between elixir agents (in the AI fashion) and JavaScript execution, and all the foot guns involved. *The event is kindly sponsored by* [Fresha](https://www.fresha.com). **Time** Doors open at 18, start at 18.30. **Venue** Fresha The Bower, 207-211, Old St, Tower, London EC1V 9NR **Refreshments** Food and drinks will be provisioned on the day. **IMPORTANT**: **If you wish to take photos and post online during the event, please notify organisers first, so that attendees can opt-out from being in photos.**

**£10 CASH FOR YOGA / £10 CASH FOR BOOK CLUB - payable on the door** **Bitcoin discount [HERE](https://btcpay.btc.aw/apps/rvvVwGSSSiJ7UgtzjmBdxy1Uq6a/pos "https://btcpay.btc.aw/apps/rvvVwGSSSiJ7UgtzjmBdxy1Uq6a/pos")** Join Storm and Annie V for another mind/body session at Cyphermunk House. Yoga starts at 11am - please bring your own mat. Munk Brunch follows at Ana's Deli from 12pm. Book club starts at 1:30pm. Promotional activities related to altcoins not permitted. No unsolicited photograhy. Peace and love.

The Humanist Monthly Program is our longest running event and still a community favorite. In the old days it used to be called "Going to HCCO" and we still like to think of it as our flagship event. We will be hearing from Becca Powell, Director of Advocacy and Outreach at Unchained At Last, an organization whose mission is dedication to ending forced and child marriage in the United States through direct services and systems change. Unchained At Last's mission clearly meshes and addresses several of our Humanist Ten Commitments. Becca will educate us about an issue many of us may not be familiar with--but should be. Food and drinks will be provided at the event. Feel free to show up a little bit early to hang out and talk. Going forward our meetings will be hybrid. You can meet us in-person or attend online Join Zoom Meeting [https://us02web.zoom.us/j/87836564953?pwd=4Mi57ElZkDIFlb1fnlNwOJ0NiOK4tP.1](https://us02web.zoom.us/j/87836564953?pwd=4Mi57ElZkDIFlb1fnlNwOJ0NiOK4tP.1) Meeting ID: 878 3656 4953 Passcode: 760812 One tap mobile +19292056099,,87836564953#,,,,\*760812# US (New York) +13017158592,,87836564953#,,,,\*760812# US (Washington DC) The formal presentation will start at noon

Come out to Improving for our monthly iOS and Mac meetings. This Month's Presentation: Nothing yet. (You should volunteer). What is Cocoaheads (http://cocoaheads.org/)? CocoaHeads is a group devoted to discussion of Apple Computer's Cocoa Framework for programming on MacOS X and iOS (including the iPhone, iPad and Apple Watch). During monthly meetings, members present on their projects and offer tutorials on various programming topics. What is BuckeyeCocoa (http://buckeyecocoa.org/)? BuckeyeCocoa is a group of Objective-C/Swift developers/enthusiasts. We host monthly Cocoaheads and near-weekly NSCoder meetings in Columbus, Ohio. The meetings are free to attend. Presentations! Presenters welcome! We are always in need of people willing to present material. Any Swift and/or Objective-C related topic is welcome. Times can be 5 minutes (i.e. lightning talks) to a maximum of 2 hours. Interested? Contact info is on the BuckeyeCocoa website. To volunteer for a presentation contact us at @BuckeyeCocoa on Twitter. Follow us on Twitter! @BuckeyeCocoa (https://twitter.com/#!/Buckeyecocoa/) For more information: http://buckeyecocoa.org/

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

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!

AI is changing how art is made. But when does it stop being your work and start being the machine’s? This month we're going to be doing a panel with with digital image, music, and written word artists, talking about at what point, while using AI in the creation process, does the work become not the artist creation? We encourage audience participation during this event that will be moderated by Chris Slee. Whether you’re deep in the field or just getting curious, come connect with others building and exploring AI in Columbus. Sponsored by [Transform Labs](https://www.transformlabs.com/services)

We connect you with up to 30 Men or Women tennis partners close to your PLAYING REGION and skill level. This program is less competitive, no champions crowned, no league standings just dedicated tennis partners who want to meet up with you on the courts. Players will meet up to play a tennis match or just to hit around. Just go through the [Join Page](https://www.tenniscolumbus.com/partner-program) to enter this program. [https://www.tenniscolumbus.com/partner-program](https://www.tenniscolumbus.com/partner-program)

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.