Lisp

Our next English Conversation Café will be on **Monday 11th May 2026 at** **7:30pm**! Topic for the evening: To be confirmed You will have an opportunity to practice your English and meet new people, through conversation topics and games. This event is mainly for learners of English, so we kindly ask native speakers to give priority to others. The venue is **downstairs** in Costa Coffee, 3 Southwark St, London SE1 1RQ which is a 1 minute walk from London Bridge Station. This is a **free** event, you will not be expected to pay for anything. You will also be able to have a free drink and cake. The café is run by a group of volunteers from [The Globe Church](https://www.globe.church). Please sign up if you would like to attend. If you have any questions please ask us using Meetup. Numbers are limited so please only sign up if you are going to come and change your response if you can no longer come. Look forward to seeing you soon 😊

Exited for this event where we'll have the amazing **Manfred Steyer** joining us **in person** talking about how to bring structure to Agentic AI\*\*!\*\* As usual there will be food, drinks and swag thanks to Revolution Technology and Angular.Love :D See you all soon! **AGENDA** • **6:00 pm** Networking/Food • **7:00 pm** Agentic UI Requires Standards: How AG\-UI\, A2UI\, and MCP Apps Work Together \| **Manfred Steyer** • **8:00 pm** Networking **Agentic UI Requires Standards: How AG\-UI\, A2UI\, and MCP Apps Work Together \|** **Manfred Steyer** Agentic AI promises systems that can plan, act, and use tools. In practice, integrating these capabilities into the UI often leads to tight coupling between frontend, agent logic, and specific backend technologies—resulting in vendor lock-in and limited flexibility. This session shows how open standards bring structure to Agentic UI. It introduces AG-UI, A2UI, and MCP Apps, and explains how they work together across system boundaries: AG-UI decouples the frontend from agent implementations, A2UI enables structured and dynamic interfaces, and MCP Apps provide reusable, backend-agnostic capabilities. Together, these standards enable flexible, decoupled architectures that remain stable even as underlying technologies evolve. **More about our speakers:** **Manfred Steyer** *Trainer, consultant, and programming architect with a focus on Angular, Google Developer Expert (GDE) who writes for O'Reilly, the German Java Magazine, and windows.developer. Regularly speaks at conferences.* Many thanks to our sponsors tonight, **Metro Bank** for hosting us and **Revolution Technology** for the food and drinks and **Angular.Love/House of Angular** for the swag :D **Revolution Technology** are a Tech Recruitment Agency who specialise in Software Engineering, Data, Infrastructure and Testing. For the past 10 years they have partnered with some of the most exciting start ups, scale ups and enterprises globally, helping them build high performing and diverse tech teams. Don't miss the next **Angular Spring Camp Meetup** on **19th of May 2026**: Master the evolution of Angular: from Zoneless performance and Signal-based state to modern testing with Vitest. [Register for free here!](https://meetup.angular.love/angular-spring-camp-2026/?utm_source=alex&utm_medium=partner&utm_campaign=angularspringcamp26) Event will be streamed online, link will be available on the day! Looking forward to meeting you all!

Want to feel more confident in English? Join our friendly group classes and practise in a relaxed, supportive environment. ✔ Improve your grammar and comprehension ✔ Build your vocabulary and speaking skills ✔ Meet new people while learning ✔ Gain a certificate for good attendance ✔ Classes are completely **free** because the teachers are training with the University of Cambridge accredited CELTA course No cost. No pressure. Just real learning, face-to-face. 📅 Mondays & Wednesdays 🕡 6:30 – 8:30 pm 📍24 Great Chapel St. London W1F 8FS (near Tottenham Court rd) ✅ Everyone welcome!

This is a mini-group class for a small number of English students (minimum 2, maximum 4) so that everyone gets lots of opportunity to speak and be corrected. We switch topics as the conversation flows, so that you can get used to talking about a variety of subjects and build your confidence, grammar and vocabulary. The atmosphere is fun and friendly and you'll meet new people to practice with. Look forward to seeing you there!

Join us for some fun, competitive, but friendly games at our 4-court sports hall. We use Yonex Mavis 600 Nylon shuttles during the 2-hour session. **PAYMENT** * **Session Fee: £9** * We are cashless, kindly pay the session fee **by midnight** on the night before the session. You are welcome to pay early! You can even pay when you book! See our About page for the full process. * If no payment is received, you will be removed and may even be liable for a late cancellation fee if your spot is not taken. * Please use **“your meetup name + date of event”** as payment reference * **Account name:** Thomas Lam * **Sort code:** 04-00-03 * **Account number:** 7478 8608 **LATE CANCELLATION OR NO-SHOW** * **All** **no-shows or late cancellations** (24 hrs or less) will be charged if your spot is not taken by someone else - you will have a title next to your name with the amount and date owed. * Members with 2 no shows/late cancellations will be removed from the group unless outstanding payment is received * **The late cancellation policy** is set up to discourage last-minute cancellations and therefore applies with or without the presence of a waitlist * **Note:** If you are on the Waitlist and a spot becomes available, you will automatically be bumped onto the On list provided the event has not yet started. It is your responsibility to **remove yourself from the waitlist** if you can no longer make it to avoid being charged a no-show if someone cancels late. **PLAYING** * Please wait to be marked off before entering the hall. * Sessions are to finish promptly on the hour by school requests. * If you finish a match with 5 minutes to go, please start packing up instead of starting a new game. **RACKET HIRE** * Please note that we won't be hiring out rackets, so kindly bring your own racket. **PARKING** * There is parking available, but it is now paid parking. Parking is opposite the entrance. Please check the signs for parking payment instructions. **TRACK & TRACE** * We will collect your phone number on-site. Your phone number will also be used in case of fire to contact you if you have not made it to the fire evacuation areas. You can see maps at the venue. We are excited to see you guys on the court! Team LSBC

Let's go with the flow and do this amazing 10 mile walk in the stunning Hampshire countryside ! Things to bring : packed lunch, water, snacks etc and waterproof jacket and walking shoes/boots/trainers. We shall buy group train tickets at 10am for the 10.30am train that arrives at Haslemere at 11.21am. Train ticket: Return to Haslemere Or you may decide to drive. Lunch stop will be by a pub in Fernhurst. You should have adequate and appropriate insurance for this type of activity and be able to walk 2.5 miles per hour. We shall have a drink at the end of the walk. Likely train back from Haslemere at 5pm that arrives in London at around 6pm. Please only post photos of others with their consent. My no is 07714250849.

Join us for our next Emacs London meetup held at University College London (UCL). A projector will be available, if anyone wants to give a presentation and/or if helpful to share Emacs tips, for some collaborative debugging, etc. We might head to a pub for a drink and/or a nibble afterward. Emacs users of all levels welcome! Interested in Emacs but not really a user? You're more than welcome too! **Call for presentations** Fancy talking about your favourite Emacs package? Proud of your latest Emacs Lisp hack and you want to tell everybody? Anything parenthesis-related that's bugging you? There'll be a monitor waiting for you for a short presentation!

uSwitch is located on the first floor of the ZPG building at 5 Copper Row, London, SE1 2LH, London (Click on the map for directions) What 3 words location: [https://what3words.com/puts.sudden.else](https://what3words.com/puts.sudden.else) The Clojure dojo is a collaborative way to learn Clojure/ClojureScript through practice. The aim is to learn a little more than before you started. This event is for those new to coding through to more experienced developers. We organise into small groups (2-4) people and write code to solve challenges great and small, chosen by those at the event. We aim to ensure someone in your group has some Clojure experience, so you shouldn't feel lost (well no more than all developers do when Stack Overflow is broken). Example challenges for the coding dojo are listed on this website: http://www.londonclojurians.org/code-dojo/ Various past exercises have been loaded to [https://github.com/ldnclj](https://github.com/ldnclj/lisp1.5/blob/master/src/lisp1/5.clj) # Approximate schedule: 18:40 Doors open and start collecting suggestions 18.45 Pizza should have arrived 19:00 Quick intros and vote on suggestions 19:15 Break out into groups and start practising 20:45 Gather together for a quick show and tell # What should I bring? We organise into small groups, so if you have a laptop with a working Clojure environment please bring it along (there are lots of online Clojure environments, so you can just use your browser too). # How do I get in to the building? At the glass doors press the buzzer to inform the security guard you are here. Say you are here for the event on the first floor. Is there way to talk with the Clojure community? Why yes. The Clojurians Slack channel is full of friendly people who love to try and help. People based in London are often in the #clojure-uk channel. Sign up for a free account to the Clojurians Slack community via http://clojurians.net/ What is Clojure? Clojure is a JVM language that has syntactically similarities to Lisp, full integration with Java and its libraries and focuses on providing a solution to the issue of single machine concurrency. Its small core makes it surprisingly easy for Java developers to pick up and it provides a powerful set of concurrency strategies and data structures designed to make immutable data easy to work with. If you went to Rich Hickey’s LJC talk about creating Clojure you’ll already know this, if not it’s well worth watching the Rich Hickey “Clojure for Java Programmers” video or Stuart Halloway “Radical Simplicity” video .

🎉 Come along to the London Scala Talks! 🎉 In this event you'll hear from Caroline Morton and Katrina Petrevice. **Agenda** 6:00pm - 🥤 Doors open. Come along and grab a drink! 6:35pm - 🗣️ Introduction 6:40pm - 🗣️ Katrina Petrevice: Caching in Scala using Ref 7:20pm - 🍕 Intermission: Join us for some free food and drinks! Vegan and vegetarian options are provided. Let us know if you'd like something special - we'd be happy to accommodate. 7:50pm - 🗣️ Caroline Morton: Accidental Functional Programming in Rust (From an Epidemiologist's Perspective) 8:30pm - 🥤 Socialising: Grab a drink and let's discuss the talks. 9:00pm - 🍻 Join us in a pub to discuss the talks! 🌐 **This event may have a live stream** Watch this space for more details. **🗣️ Katrina Petrevice: Caching in Scala using Ref** Caching in memory is often one of the first strategies used to improve system performances. However, implementing caching in a purely functional way introduces unique challenges, specifically around state management and testability. In this talk, we will look at how to utilise functional programming principles with [Ref](https://typelevel.org/cats-effect/docs/std/ref), while maintaining clarity and composability. We will also deep dive into some common pitfalls and look into practical ways to test Ref effectively. ⭐ Katrina Petrevice ⭐ Katrina comes from a non–computer science background and was first introduced to Scala while working at JPMorgan. She credits much of her Scala knowledge to hands-on experience within her team, where she works on building and maintaining data pipelines and managing data systems. Since then, she has developed a strong interest in functional programming and now co-leads the Functional Programming Group at JPMorgan, where she helps share knowledge and foster a community around these ideas. **🗣️ Caroline Morton: Accidental Functional Programming in Rust (From an Epidemiologist's Perspective)** I don't have a background in functional programming - and I never set out to write it. But somewhere between writing trait-based epidemiological pipelines, composing data transformations, and leaning hard on Result, enums, and pattern matching, I started hearing from others: “That's pretty functional.” In this talk, I'll explore what it means to write “functional-ish” Rust as someone solving real-world scientific problems. I'll walk through the patterns I reach for - like chaining iterators, avoiding shared state, and embracing expressive types - and reflect on which functional programming ideas emerge naturally in Rust, even if you're not trying. I'll also share how designing for epidemiologists - most of whom are used to chaining functions in Python (like Pandas) or R - has pushed me toward creating ergonomic Rust APIs with Python and R bindings. These tools aim to feel familiar to scientists while leveraging Rust's power and safety under the hood. This is a talk for functional programmers curious about Rust, and for Rustaceans wondering if they've been functional all along. No formal theory required - just real code, real use cases, and a pragmatic perspective from someone building public health tools in Rust. ⭐ Caroline Morton ⭐ Dr. Caroline Morton is a medical doctor, epidemiologist, software engineer, and PhD candidate specialising in synthetic data, epidemiology, and Rust. With 60 peer-reviewed papers and two books on software, she combines deep technical expertise with a commitment to improving scientific workflows. Caroline co-founded the first [Women in Rust](https://www.meetup.com/women-in-rust/) group, fostering diversity and encouraging more women to explore opportunities in systems programming. She leads an open-source project improving codelist management in epidemiology using Rust, creating efficient, reliable tools for health data research. Her PhD focuses on synthetic data methods for epidemiology, particularly using Rust to generate large, realistic datasets. A strong advocate for open science and reproducibility, she contributes extensively to improving software practices through publications, workshops, and open-source projects. ———————————————————— 🗣️ Would you like to present, but are not sure how to start? Give a talk with us and you'll receive mentorship from a trained toastmaster! Get in touch through [this form](https://forms.gle/zv5i9eeto1BsnSwe8) and we'll get you started 🏡 Interested in hosting or supporting us? Please get in touch through [this form](https://forms.gle/3SX3Bm6zHqVodBaMA) and we can discuss how you can get involved. 📜 All London Scala User Group events operate under the [Scala Community Code of Conduct](https://www.scala-lang.org/conduct/). We encourage each of you to report the breach of the conduct, either anonymously through [this form](https://forms.gle/9PMMorUWgBnbk1mm6) or by contacting one of our team members. We guarantee privacy and confidentiality, as well as that we will take your report seriously and react quickly.

Discover the World at International Cafe! We are a group of Christian volunteers set out to create a friendly community that welcomes everyone! Come and practice speaking English with our English speaking volunteers. You will learn more about British culture and discuss life with NEW topics each week. We also include a Bible story at the end of our sessions. At International Cafe, we start our meet up with Tea & Coffee and continue in engaging conversations. Each week, we'll look at NEW topics about British culture and history, so you can learn and socialize. Best of all, it's a free event and open to everyone! So mark your calendars: 🕕 Time: **Sunday at 2:30 PM** 📍 Address: ECIR OEA, Inspire at St James Questions? Text Organiser at 07708228436.

This month we're doing something a bit different. Edward Boggis-Rolfe has very kindly offered to host us at the moorings where he has a boat, just up past Tower Bridge. We'll have access to a small event space, right on the river, which is covered, but outdoors. We'll have a BBQ going, serving sausages, and free drinks. The cost of the food and drink is being covered by Undo - so thanks to Undo, too! But rather than just be a social event, we do want to include some C++ content, too. We'll have access to a screen and projector - but whether we'll be able to use them depends on the weather! So we're inviting anyone that wants to give a **lightning talk** to let us know. The one caveat is that you'll need to be prepared to give it *without slides* if we can't use the projector (we should have audio, at least). As an extra incentive we'll be holding back a few places for people who can give talks. Spaces will be limited overall, but if you do a talk your place is assured! So submit your ideas here: [cppldn.uk/speak](https://philnash.typeform.com/to/pJVp7s) 5 minutes, something related to C++, slides optional. Go!

Improve your Spanish/English with a bunch of friendly people over a pint! ¡Puedes mejorar tù Español/Ingles con un grupo de personas amables con una bebida!

MCP is changing how developers build with AI, but we're just scratching the surface. Join us for an evening of talks that go beyond retrieval to explore what's actually possible when you give agents real tools, real constraints and real APIs. **Agenda** ​6:00 PM - Doors open, registration and networking ​6:10 PM - Welcome (Upsun & Cloudflare) ​6:20 PM - MCP: Context is Everything! - Carly Richmond, Elastic ​6:45 PM - Sandboxes: how to limit agents so we can use them more - Patrick Dawkins, Upsun ​7:00 PM - Break (Food & Drinks) ​7:30 PM - Cooking with MCP in VS Code - Liam Hampton, Microsoft ​7:55 PM - Efficient tools with MCP code mode - Confidence Okoghenun, Cloudflare ​8:15 PM - Open networking and drinks ​9:00 PM - Close 🗣️ ​**Talks** ​**MCP: Context is Everything! - Carly Richmond (Developer Advocate Lead, Elastic)** ​MCP is a powerful tool for giving LLMs capabilities to not just retrieve information, but to automate key actions based on relevant data. Let’s see how it can be used for retrieving relevant context and other activities such as observability. ​**Efficient tools with MCP code mode - Confidence Okoghenun (Senior Developer Advocate, Cloudflare)** ​Traditional MCP approaches choke on context windows: Cloudflare's 2,500+ endpoint API would require 1.17 million tokens. Code Mode flips the script by having LLMs write code against typed APIs instead of making direct tool calls, achieving 99.9% token reduction. Come learn how code mode works and how to optimize your MCP tools with it. ​**Sandboxes: how to limit agents so we can use them more - Patrick Dawkins (Principal Engineer, Upsun)** ​We want our agents to run longer and use more tools, but we're hampered by constant prompts for approval. Sandboxes are the practical middle ground: isolate the agent so you can stop watching every command and let it work. This talk covers what "sandbox" means, who provides them today and the Linux primitives that let you build one yourself. ​**Cooking with MCP in VS Code - Liam Hampton (Senior Cloud Advocate, Microsoft)** ​In this session Liam will show you how VS Code is fully supporting the MCP spec, from MCP Apps to sandboxing and elicitations. 📅 **Date and Time:** Thursday, May 14, from 6:00-9:00 PM 📍 **Location:** Cloudflare Address: 6th Floor, County Hall/The, Riverside Building, Belvedere Rd, London SE1 7PB, UK 👉 You can also register here: https://luma.com/eb8j6lhu **⚡️ Interested in giving a talk? ⚡️** Have you ever considered presenting on your Elastic use case? We welcome 5-10 minute lightning talks, 45-minute deep dives, and everything in between. If you're interested, please submit via our [CFP](https://sessionize.com/elastic-meetups/) or send us an email at [meetups@elastic.co.](http://meetups@elastic.co./)

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/

Rev. Steven Clevenger is an ordained spiritualist minister with over 40 years experience as a Spiritual Healer, Clairvoyant and Spiritual Teacher, educated and trained at the White Lily Chapel. Rev. Siobhan Wolf Shaffer is an ordained spiritualist minister and certified medium and healer with over 20 years experience. She began her development in 1988 in Pennsylvania and continued when she moved to Ohio in 1998 where she studied at Rays of Lights Church with Rev. Steven Clevenger. Our full worship services consist of an inspirational lecture, healing meditation, and messages from the spirit world that serve to demonstrate evidence of eternal life. Please visit our Official Church Website (http://raysoflightchurch.com) for more information.

**Improving Office in Franklinton** Physical location: Improving Office 330 Rush Alley Suite #150 Columbus, OH 43215 Schedule: 6:00 p.m.: Socialize, eat, and drink. Improving will be providing pizza and beverages. 6:30 to 8:00 pm. Main meeting and presentation(s). Topic: This month John Lairson will share a notebook describing the Alpaca (Paper) Trading API and discuss different algorithms for evaluating stock trades. We meet on the last Monday of each Month. Presentations are given by members and friends of this group. If you would like to do a presentation (small or large) on a python topic, please contact Central OH Python at centralohpython@gmail.com

Let's grab some coffee/food and share a morning chat! The East Market has an ample parking lot and outdoor and indoor seating. Grab a cup of coffee from Winston's Coffee & Waffles or on your way to East Market and meet us on the second floor - table behind or east of the elevator. Per what this group is about: "Everyone is welcome! International transplants to Columbus who want to improve language skills, Columbus residents who enjoy talking to people from other countries, and those who would like to discuss international travel and culture, and who enjoy getting together for good conversations."

Join us for a practical, beginner-friendly guide to choosing the right large language model. We’ll compare major models like ChatGPT, Claude, Gemini, and Llama, talk about when to use hosted APIs versus local models, and break down the tradeoffs around cost, speed, quality, privacy, context windows, coding ability, and reliability. You’ll leave with a clearer mental model for picking an LLM based on your actual use case instead of hype, benchmarks, or brand names. No deep AI background required. LOGISTICS AND PARKING: The talk starts at 7:00 PM. The first half hour is reserved for everyone to get set up and mingle. Free pizza and drinks! The cheapest parking option is to find street parking, which will only cost you a few bucks. Otherwise, park in the nearby veteran's museum lot for $8. It's highly recommended you avoid the nearby $15 garage parking.

# **Saturday, May 16, 2026** **Beginners’ Session 1:30 to 2:00 PM** **Dancing 2:00 to 4:30 PM** **Please note that this is an afternoon dance!** **You are invited to join us for dinner at Olive and Lime (in the church’s back parking lot) after the dance.** **Kim Thompson, from Athens, will take the mic and we’ll dance to the music of Roscommon Sessions. Kim will lead us through a variety of old and new dances that welcome newbies and delight experienced dancers.** **Roscommon Sessions, a traditional Irish music quartet from Columbus, Ohio, began their musical journey centered around the energy and spontaneity of Irish sessions. They are excited to bring their lively jigs and reels, a couple of flowing waltzes, and the occasional musical surprise to the All Soles contra dancers!** **Roscommon Sessions is Steve Steele (guitar), Jim Lindroth (percussion), Carol Metheny (fiddle) and Sarah Sigmon (fiddle).** **We hope to see you dancing!** **Location: First Unitarian Universalist Church, 93 W. Weisheimer Road, Columbus, OH 43214.** **Cost is $10 for adults, $5 ages 12-25.** **New to dancing? A beginners’ session, from 1:30 to 2:00 PM, will get you started. You will learn some basic figures that will be repeated in the afternoon’s dances. All dances will be taught and no partner is needed. Dancing is from 2:00 to 4:30 PM.** **Please bring your own refillable water bottle.** **All Soles Dance upcoming dance dates are, as follows:** **June 20, 2026** **Tentative:** **July 25, 2026–Summer Potluck and Dance** **No August Dance** **September 26, 2026** **October 17, 2026** **November 21, 2026** **December 19, 2026** **Visit our website at: https://firstuucolumbus.org/connection/all-soles/**

**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** TBD **YouTube Link** TBD