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**REGISTER AT THE LUMA EVENT PAGE!!!** https://luma.com/27ja5gwl Join us for an exciting talk by Mary Gibbs, Senior Applied Scientist at Relativity. ​ ​**​Agenda:** ​​6:00 - 6:30 PM - Welcome and mingle 6:30- 6:45 PM - Introductions 6:45 - 7:30 PM - Talk 7:30 - 8:00 PM - Wrap up **​​Description:** ​If you have ever shipped a model, watched your metrics improve, and later learned from your users that something was wrong, the metrics were always wrong. You just didn’t know it yet. An evaluation consists of three components, a benchmark, a scorer, and a claim about what a score represents. Each component has its own weaknesses. Benchmarks can suffer from narrow coverage, contamination, or saturation. Scorers are often chosen for ease of automation or computation rather than for their alignment with user outcomes. And the claim connecting a score to reality is rarely made explicit. These gaps compound across the model development lifecycle. When metrics improve, teams treat that as a signal and optimize directly against it, which is how a measurement problem becomes a model problem. This talk maps where evaluations can go wrong, considers counterarguments, and ends with practical advice for building better ones. **​Speaker Bio:** ​Mary is a Senior Applied Scientist at Relativity, tackling data science challenges in the e-discovery and legal tech space. She is also an organizer for Women and Gender eXpansive Coders DC (formerly Women Who Code DC), fostering a community dedicated to empowering women and nonbinary individuals to excel in their careers. Mary's experience spans various domains. She has developed data science solutions related to job search and career progression at Teal, cybersecurity challenges at LiveAction Software, and commercial and government consulting at Mosaic Data Science. Before venturing into the field of data science, Mary conducted and published research pertaining to the cellular and molecular mechanisms underlying neurodevelopment at the National Institutes of Health. In other words, she has dissected and imaged a lot of fruit fly brains. She holds a M.S. in Data Science from The George Washington University and a B.A. in Biological Sciences from Cornell University

Hi everyone! Tuesday Night Skates are in full effect! Meet every Tuesday outside of the NOMA-Galladudet U Station at the North entrance (1305 2nd St NE). We will head out at 7pm sharp for an 8 mile skate followed by pizza! We'll skate up the Metropolitan Branch Trail to the Ft. Totten Metro station and back down the trail to M St NE for pizza at Andy's. See ya there! This skate is led by Asher and myself. 🛼 This ride is BEGINNER FRIENDLY! While the full ride is 8 miles long, you have the option to tap out at one of the three red line metro stations along the route in both directions. You'll also have an opportunity to learn new skills and practice drills with the skate leaders at our regroupping spots along the route. The tap out points are as follows: 2 miles: Rhode Island Ave Metro 2.5 miles: Brookland Metro 4 miles: Ft Totten Metro 6 miles: Brookland Metro (on the way back) 7 miles: Rhode Island Ave Metro (on the way back) 8 miles: Andy's Pizza This is a great way to test and build up your endurance while skating! At least one of the skate leaders will skate at your pace, so you'll never be left behind. Join us at Andy's Pizza afterwards for a FREE slice of pizza with the purchase of any alcoholic beverage or N/A lemonade! Route Map: https://www.gmap-pedometer.com/?r=7752153 If we need to cancel one week due to weather or other reasons, we'll update the event page in advance.

There is supposed to be a let up in the seemingly incessant rain. Let’s take advantage with a walk at Brookside Gardens. We will meet to the right of the visitors center. If anyone is interested we can go to lunch afterwards.

Brisk 3- to 4- mile urban hike starting outside Hotel Hive and finishing at their rooftop Hive Bar. We will hike to Theodore Roosevelt Island, across the Key Bridge, and back through Georgetown to Hive Bar for drinks and food. Closest metro GWU.

## Please read all below before you sign up **Cost:** Free **Court Type:** Outdoor Grass **Level:** BB/A **Transportation:** Parking will be right by the grass. **What to bring:** at least 3 bottles of water and a ball/net if you have one. **8 persons per net max** **Host's Philosophy on This Event:** The purpose of this meetup is to create a fun and supportive environment where we can improve our skills, enjoy competitive games, and connect socially. While we do aim to play seriously and challenge ourselves, the focus is more on growth and enjoyment than simply winning at all costs. That’s why the title doesn’t include “competitive” or “social”—we want a healthy mix of both. We do expect a mindset geared toward learning and getting better over time. That said, this event isn’t intended for total beginners; an understanding of the game is expected so that everyone can contribute to meaningful and engaging matches. The host holds the right to remove you from the game if they believe that you are at a C level (absolute beginner). If you can't pass to the setter, for example, you are a beginner. **Skill Level:** 1. **If you want to know your level, please see the link below:** [Smiley Social Volleyball Levels](https://docs.google.com/document/d/1PojSi4qdlRsv1msCHhvpQ43iDc4FfzQwpWCc3kafVMY/edit) **YouTube:** The games may be recorded and uploaded to our channel here: Let the host know if you have an issue with this. [Youtube](https://www.youtube.com/@mp02626) **ATTENDANCE:** **Player Selection:** Regulars > Your Vibe > Skills > \*Flaky-ratio (your attendance ratio) > New Members \*If you have attended 3 events and dropped 6, you may or may not be invited. Anyone with a flaky ratio of -.50 or lower. If you have a recent no-show, you may not be invited. The host takes attendance very seriously. Please remove yourself from the event (if you can't make it) as early as possible to allow others to join. You will be marked as a ***no-show*** if you don't show up to the event. [Smiley Social Rules](https://docs.google.com/document/d/1HrG35p_0M08leRvCp8XWG3CMkr_GL928XFabl5T6Dvg/edit) **Q&A** *-Bringing your dog or cat is welcome and encouraged.* -Can I come if I don't know how to play? \*No, you may not. The host does teach a beginner's volleyball class that you may attend on Saturdays. -Can I be late or leave early? *The host expects you to be there **on time** and leave on time. If you need to come late or leave early, please let the host know ahead of time.* -Can I come even if I am not on the going list? \*No, sorry -How can I improve my flaky ratio? *You can attend other Smiley events. Commit to showing up.* -Why are new members accepted last? *Because they are the most flaky.* -NO SMOKING (anything) **Smiley Social Important Links:** 1. [Group Rules](https://docs.google.com/document/d/1HrG35p_0M08leRvCp8XWG3CMkr_GL928XFabl5T6Dvg) 2. [Liability Waiver](https://docs.google.com/document/d/1W2mq-7m99lmvd7gdWYaSUFtvVg4UGnzV6koafAbHmco) 3. [Volleyball Levels](https://docs.google.com/document/d/1PojSi4qdlRsv1msCHhvpQ43iDc4FfzQwpWCc3kafVMY/)

\-\-\-\-\-\- [REGISTER FOR THE EVENT HERE (ON LUMA)!](https://luma.com/be8kjf6n) \-\-\-\-\-\- Join us for an evening of collaborative problem-solving as we work on a variety of civic tech projects together. Project needs vary but often include brainstorming, researching, writing, coding, or analyzing data. Check out [our website](https://www.civictechdc.org/projects) for a list of projects which may make an appearance! Meet other civic tech enthusiasts. Learn new skills. Contribute to a project to improve a local civic issue. **All are welcome and collaboration is encouraged.** Laptops are recommended but not required. **Where do I register?** To better serve our growing community, we’re transitioning our event registrations to [Luma](https://luma.com/civic-tech-dc)! **We still love Meetup** Meetup has been an incredible platform for us to build and connect with our community. We’ll continue sharing upcoming events there so that new people can find us, but [Luma](https://luma.com/civic-tech-dc) will be our primary registration platform moving forward. **Why we're making the switch** Meetup’s registration system has some limitations, and we need more flexibility to manage sign-ups and engagement. \-\-\-\-\-\- [REGISTER FOR THE EVENT HERE (ON LUMA)!](https://luma.com/be8kjf6n) \-\-\-\-\-\-

Hands-on learn how to save life & limb, when mired in the wilderness of an urban disaster zone, travel or rural area far from hospital, or natural area miles from an access point, during the critical minutes or hours before ambulance arrival. Come away with actual do-it-yourself care-giving skill and confidence, and 2-year SOLO certification. Counts as WFR Recertification, too. No prerequisites. YOUR SPOT IS NOT RESERVED UNTIL YOU'VE COMPLETELY REGISTERED AT WWW.SOLOWFA.COM \***Spaces are limited. REGISTER: www.solowfa.com or 434.326.4697** Can't make these dates? Check out more course locations and dates on our website. WHO: Open to the general public, adults & teens with solid attention spans. Know your loved ones are safe wherever they are. WHY: Mired in a disaster zone, travel or rural area far from a hospital, or natural area miles from an access point ... accidents, destructive weather, and terrorism happen, and all-too-often members of a group are not capable of dealing with the emergency. This leads to improper care of the patient, and endangers the entire group. Many recreational accidents are preventable, and improper care of trauma can compound even simple injuries. Very few first aid programs actually address the issues of providing emergency care in a setting where 911 is overwhelmed or not immediately reachable. In this course, classroom instruction and Q&A are interwoven with practical work and problem-solving exercises. Hands-on experience - a most powerful learning tool - during scenarios comprise \~50% of class. TIMING: This is a 2-day class, Saturday and Sunday, 8:00am -7pm each day. Fee: $295 (Earlybird)

En honor al Mes Nacional de la Actividad Física y los Deportes, Zócalo Health ofrece un taller para ayudarle a fortalecer su cuerpo y mantenerse activo—sin necesidad de un gimnasio. Este taller, dirigido por una fisioterapeuta licenciada, se enfoca en movimientos seguros y fáciles para todas las edades y niveles. **Para todas las edades. GRATIS.** Langley Park Community Center, 1500 Merrimac Dr, Hyattsville 20783 **Código de boleto:** [SPD-SPEC-GA-20260528](https://mdpgparksweb.myvscloud.com/webtrac/web/search.html?Action=Start&SubAction=&_csrf_token=bc6M686G1L6Y2D2R213X2L4I5N405Y59725O3Y6D53716Y4M5H6S07734L5U5R1I5K5Z4E4W725O4G6G530J5T4N515Q6S5X4J5C5K715L4I54680969605F4V6H534W6F&quantity=1&begindate=01%2F07%2F2026&enddate=01%2F07%2F2027&keyword=&keywordoption=Match+One&secondarycode=SPD-SPEC-GA-20260528&display=Detail&module=PST&multiselectlist_value=&pstwebsearch_buttonsearch=yes) Los talleres se presentarán en español. Se requiere inscripción. Utilice el código del boleto para registrarse en [pgparksdirect.com](pgparksdirect.com). Nos puede contactar al correo electrónico [wellness@pgparks.com](wellness@pgparks.com) si tiene alguna pregunta. **Move Well, Live Well: Building Everyday Fitness for a Healthier Maryland (\*PLEASE NOTE\* Workshop will be presented in Spanish)** In honor of National Physical Fitness and Sports Month, join Zócalo Health for an energizing workshop focused on building strength, mobility, and resilience—no gym required. Led by a licensed physical therapist, this session emphasizes safe, functional movement for all bodies and fitness levels. **All Ages welcome; FREE**. Langley Park Community Center, 1500 Merrimac Dr, Hyattsville 20783 **Ticket Code:** [SPD-SPEC-GA-20260528](https://mdpgparksweb.myvscloud.com/webtrac/web/search.html?Action=Start&SubAction=&_csrf_token=bc6M686G1L6Y2D2R213X2L4I5N405Y59725O3Y6D53716Y4M5H6S07734L5U5R1I5K5Z4E4W725O4G6G530J5T4N515Q6S5X4J5C5K715L4I54680969605F4V6H534W6F&quantity=1&begindate=01%2F07%2F2026&enddate=01%2F07%2F2027&keyword=&keywordoption=Match+One&secondarycode=SPD-SPEC-GA-20260528&display=Detail&module=PST&multiselectlist_value=&pstwebsearch_buttonsearch=yes) This workshop will be presented in Spanish. Registration is required. Use the ticket code to register at[ pgparksdirect.com](pgparksdirect.com). Email [wellness@pgparks.com](wellness@pgparks.com) if you have any questions.

**\*TO ATTEND REGISTER AT - [https://www.socialevents123.com/event-details.aspx?id=13390#tix](https://www.socialevents123.com/event-details.aspx?id=13390#tix)** Cost: $15- $20 depending on how early you register. (\*Multiple Meetup groups are co-organizing so RSVP's shown are just a small % attending. ABOUT: Do you know more than 6th Graders! Here is your opportunity to have some fun playing our Live interactive trivia game (Categories will be History, English/literature, Geography, Science, Math, Potpori). HOW IT WORKS: You can attend via a computer & Webcam or Smartphone/Ipad/Tablet. This completely online event will be LIVE and you will be able to see and hear the other participants while playing. In addition you get to meet and interact with other participants. At game time, your host will read off Trivia questions. Your goal is to come up with the right answer to each question and write it down on your paper. Once the round is over (about 6 questions), we will go through the answers and determine who had the highest score for the round. They will get a raffle ticket for a chance to win a prize at the end of the event. We will have multiple rounds of play and have a system to also virtually introduce you to other participants. HOW DO YOU FIND THE VIRTUAL ROOM: After you purchase your ticket, you will get a confirmation with the zoom link ON DAY OF THE EVENT. RSVPS ON HERE ARE NOT REFLECTIVE OF ACTUAL ATTENDANCE as this is a multi group event. **\*TO ATTEND REGISTER AT - [https://www.socialevents123.com/event-details.aspx?id=13390#tix](https://www.socialevents123.com/event-details.aspx?id=13390#tix)** Cost: $15- $20 depending on how early you register.

DeafPlusAdvocate is hosting our monthly ASL Social event in the DMV. Join us for a late spring ASL Social at Garden Social. Also, enjoy Hawaiian cuisine and great outdoor and indoor space. .If you are Deaf/hearing, interested in socializing, or looking for practice with American Sign Language (ASL), join us! All ASL levels are welcome! This is the perfect place for you! We will host ASL Social on Saturday, May 30th, at the L&L Hawaiian Barbecue from 5:00 PM - 8:00 PM. The address is: 4363 John Marr Dr, Annandale, VA 22003. If you have any questions, please don't hesitate to contact the DeafPlusAdvocate team.

Join PSW Science® on May 29 at 8 PM as we welcome Michael Garrett (U. of Manchester) & Adam Thompson (NVIDIA). During the question and answer period, in-person attendees and live stream viewers may ask the speaker questions, and in-person attendees may also engage with the speaker during the post-lecture reception. Refreshments are served. For more information on this meeting, please visit: https://pswscience.org/meeting/2536 The meeting will be held in the John Wesley Powell Auditorium, adjacent to the Cosmos Club. The Powell Auditorium is located at 2170 Florida Avenue, NW Washington, DC 20008. Use of the Cosmos Club is restricted to the Powell Auditorium, the entryway to the auditorium, and the restrooms immediately outside the auditorium. Please note there is no onsite parking available. PSW Science, founded in 1871, is one of the oldest scientific societies in Washington D.C. Now, over 150 years later, we celebrate the Society's rich history and contributions to scientific discovery and cross-disciplinary collaboration. For information on how to become a member of PSW Science and membership benefits, please visit https://pswscience.org/join/

This moderate hike begins at Meadowbrook Park in Montgomery County, MD. Enjoy the quiet woodland trails and creek views which are a hidden joy in this northern section of DC’s Rock Creek Park. We may see woodpeckers, waterbirds and other wildlife, along with lingering wildflowers as we hike. The path will take us into DC at the boundary bridge and we will travel the Valley trail, then cross over one of the small bridges that span Rock Creek to the Western Ridge trail for our return. This peaceful walk along Rock Creek and through mature woodlands has rolling hills with several ups and downs, and a steam crossing or two. Poles might come in handy for the stream crossings and some of the steeper sections, but are not strictly necessary. Most of the trail is natural surface with some rocks and roots, so please wear appropriate footwear. Please make sure to bring water to drink! And consider sunscreen and insect repellent. There are portable toilets near the start of our hike. (I will check on this–the last time I walked this they had been removed, but typically there are facilities near the playground.) **Time to meet:** Please meet at 9:45 for introductions and sign in. We will start hiking promptly at 10:00 **Contact information**: Please use the comments feature for routine comments and questions. The hike leader is Nancy 240-498-1034 Call or text if urgent. **Directions to the trailhead:.** The address: 7901 Meadowbrook Lane, Chevy Chase, MD 20815. Go all the way to the end of the road where there is a parking lot near a playground and ballfields. We will meet near the stone building. (You may see signs directing you to Candy Cane City, which is the local name of the playground.) The GPS coordinates: 38.98672981029209, -77.06160880892341 **Elevation Gain**: 348 ft. **Pace:** 2.0 to 2.5 miles per hour **Cancellation:** In the unlikely event that the hike needs to be cancelled, it may be cancelled up to the evening before the hike. Hikers will be notified through comments on this posting **Notes:** **PLEASE RSVP IF YOU PLAN TO ATTEND THIS HIKE. DO NOT SHOW UP UNREGISTERED!** If YOUR PLANS CHANGE, UPDATE YOUR RSVP BY NOON THE DAY PRIOR TO ALLOW SUFFICIENT TIME TO FILL YOUR SPOT. **SIGNING OUT AFTER NOON WILL BE CONSIDERED A "NO SHOW," AND REPEATED INSTANCES MAY RESULT IN BEING BARRED FROM PARTICIPATING IN FUTURE HIKES.** IF YOU ARE ON THE WAITLIST, PLEASE CHECK YOUR STATUS AFTER 4:00 PM THE DAY BEFORE TO SEE IF YOU HAVE BEEN MOVED TO THE "GOING" LIST. IF YOU ARE ON THE WAITLIST AND NO LONGER WISH TO ATTEND, IT IS IMPORTANT TO SIGN OUT EVEN IF YOU ARE NOT CONFIRMED, OTHERWISE YOU MAY BE MARKED AS A NO SHOW. -A well-trained, leashed Fido is welcome on this hike. -Please keep this a fragrance free event. -To find out more about PATC, [ click here](https://www.patc.net/). -Consider becoming a member of PATC. To join, [click here.](https://www.patc.net/membership).

We'll get in around 4 miles at Three Creeks Metro Parks, primarily natural trails. 17-18 minute miles, no one left behind, and faster walkers are free to lead out. Optional lunch after! If you're joining for hiking all the metro parks, this is the sixth one!

Couldn't make Knowledge? Or want to debrief the dancing robots or Autonomous Workforce? Join us for a Knowledge '26 recap, insights sharing, a couple rounds of golf, and fun at Topgolf. As always, drinks and food will be provided. More details to come — mark your calendar, RSVP, and save your spot today!

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/

Our monthly PHP meetup. A virtual shindig courtesy of Zoom. Check back here for the details around 6:15 pm

**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** Like it or not, AI agents are now capable of turning a quickly written paragraph of requirements into a pull request that is ready to be integrated into real-world production applications and it's now our responsibility to make sure AI doesn't go rogue and take down prod - or corrupt our data by misunderstanding the requirements or our existing schemas. In this session we'll explore strategies to protect our codebases through unit and integration testing, documentation, and code review along with additional ways of providing context and guard rails to our AI agents as they carry out the work we've assigned them to do. By the time we're done, you'll have a firm grasp of the problem and understand some helpful options for protecting your codebase from vibe coding mishaps getting YOLOed into prod. **YouTube Link** TBD