Decentralized Systems & Applications

**Choros Open Happy Hour** This is our monthly open Happy Hour for Choros — the guy’s social app that matches small groups of men in DC for real-life hangs. If you’ve been curious about the community or just want to meet some of the guys before jumping in, this is the easiest way. **[It’s open to anyone who signs up for the app.](http://chorosapp.com/)** Once you’re in the app, the exact location and details will unlock in your “Upcoming Activities.” We keep addresses private so the groups stay high-quality and everyone attending is actually part of the community. At the happy hour you’ll meet current members, new guys, and the founder (me), and get a feel for how the small-group vibe works. No pressure, no awkward icebreakers — just a chill way to plug into the DC crew. If you want to come, start by[ ](https://form.typeform.com/to/DTAHl4GL)**[filling out a join request here.](https://form.typeform.com/to/DTAHl4GL)** After that, we'll get you set up in the app, and the location will be shown there. Looking forward to meeting you.

***In Person Location:*** Rockville Library, second floor meeting room (Collaboration Room 4). We are experimenting with a new virtual join link - [https://meet.jit.si/mocomakers](https://meet.jit.si/mocomakers) If you can make it in person, that's always recommended! We've identified a flawed powerline component we, if it comes soon enough we will solder it in, and troubleshoot downstream electronics to see if any other components are busted (following a wiring mishap). We've had this component 'blow out' before and fixing it then we sufficient, so hopefully we get lucky again. The component however is currently very delayed, so until that comes we might need to focus on a backlog of documentation development. Our community is building (and documenting for other teams) how to build a scanning tunneling microscope using a mix of common and 3D printed parts. This will allow us to scan and visualize a single atom - an ambitious we are doing over the course of a few months. The MoCo Makers community is one of the most innovative and competent groups in Maryland, and we've done everything from [publishing cancer research](https://pubmed.ncbi.nlm.nih.gov/38136356/), to [launching products](https://www.kickstarter.com/projects/gotim/cozy-curvy-multi-contour-pillow), [winning grants](https://covidinfocommons.datascience.columbia.edu/awards/2014255), and inspiring thousands. Now our biggest challenge yet has appeared. We are building a Scanning Tunneling Microscope, that will allow us to scan and visualize single atoms. Does it sound hard? Perhaps.. However! I have every confidence that we are now operating at a level were we can take on this mean, cross-functional project. We continue to build on our past successes, and a key technology we previously applied was increasing the signal of small voltages using OpAmps - which we did during our custom pH Probe project - [https://www.mocomakers.com/ph-probe/](https://www.mocomakers.com/ph-probe/) \- That technology is exactly what we need to get this machine working\, and at a high precision\! To get a better idea of what we are doing, see our reference project here: [https://www.youtube.com/watch?v=7N3OqTEq08g](https://www.youtube.com/watch?v=7N3OqTEq08g) All starting CAD, code, and reference files should exist. However, let's be the first Maker community to document the build process and share it with learners around the world. We have a bit over $2,000 in materials costs, so if you want to sponsor this project, and get banners at events with 20K attendees, and access to our email broadcast of 30K members, please contact matt@mocomakers.com We are also open to university, lab, or community partnerships so feel to reach out if you want to be part of this project. Together, we can do incredible things. ***In Person Location:*** Rockville Library, second floor meeting room (Meeting Room 4). To Join Virtually: https://meet.jit.si/mocomakers

[Profs and Pints DC](https://www.profsandpints.com/washingtondc) presents: **“Robert Frost’s Winter Poems,”** an exploration of a beloved poet’s thoughts on the season, with Michael Manson, former lecturer on literature at American University and past president of the Robert Frost Society. [Advance tickets: $13.50 plus sales tax and processing fees. Available at [https://www.ticketleap.events/tickets/profsandpints/hill-center-frost-poems](https://www.ticketleap.events/tickets/profsandpints/hill-center-frost-poems) .] “Whose woods these are I think I know. His house is in the village though; He will not see me stopping here To watch his woods fill up with snow.” So begins “Stopping by Woods on a Snowy Evening,” which ranks as one of the most popular American poems of the 20th century and helped cement Robert Frost's status as of one of our nation’s most beloved poets. Come to the Hill Center on Capitol Hill as we approach the darkest evening of the year for a talk that will have you delighting in Frost and embracing the arrival of winter. Winter challenges modern urban Americans less immediately than it did Frost, who owned several New England farms. Yet the questions Frost raised through the metaphor of winter remain vital. Are humans meant to live and thrive on this planet, or is existence some cruel joke? How do we explain human resilience, the ability to keep pushing through despite the odds? Is there some force above us, in life itself, or some stubbornness at the heart of being human? What does it mean to thrive? Frost raised questions like these in his poetry without answering them. For him, the answers are to be found in the process of making. Whether we’re writing poems, keeping gardens, playing sports, building careers, or raising families, we are all turning chaos into order. In all pursuits, Frost said, “strongly spent is synonymous with kept,” and he is inspired by those times when humans spend their lives strongly and thus keep them. Be on hand as Michael Manson, a veteran scholar of Frost, reads and discusses Frost's poems on winter and other subjects. He’ll cover some of Frost’s best-known poems—“Stopping by Woods,” “Desert Places,” “The Wood-Pile”—as well as lesser-known works such as “Afterflakes,” “Questioning Faces,” and “Good-bye and Keep Cold.” The experience will be magical, and you’ll end up with a different perspective on the season ahead. (Doors: $17, or $15 with a student ID. Listed time is for doors. Talk starts 30 minutes later.) Image by Canva.

Get ready to kick off the holiday season with a chill December Happy Hour at Red Bear Brewing Co - Dudes in the District style! Join the dudes for the December happy hour! This month we are meeting up at Red Bear Brewing. Drop by to catch up, share a drink, and say hi! To Join Our Community Click Here: [https://discord.gg/xF6fBtgfRd](https://discord.gg/xF6fBtgfRd "https://discord.gg/xF6fBtgfRd")

🌧️ Weather Update – Thursday Plans 🌧️ Due to rain this Thursday, we’re postponing ZooLights and instead doing a cozy indoor social at Red Bear Brewing. 🍺 Warm vibes, good drinks, and great people — first-come, casual, and open to everyone. 📍 Red Bear Brewing 209 M St NE, Washington, DC 20002 🚇 Closest Metro: NoMa–Gallaudet U (under 5-minute walk) 🕕 Same start time ZooLights will be rescheduled for a clear night 🎄✨ Hope to see you there!

• What we'll do On https://blackecon101.podbean.com/ Thursdays at 6 pm. discussing the economy....

Want to mess with some electronics? Or perhaps contribute to HacDC's main group project? HacDC's latest event brings hardware projects to the community. We will focus primarily on the main project (Space Blimp!) but please feel free to bring some of your own projects to show off and work on!

**✅ First class is FREE – only 10 spots available!** Learn real self-defense skills in a small-group setting. No experience needed, open to all adults. 📲 RSVP now and text Jim at **301-326-9146** to confirm—once spots are gone, they’re gone. ## **Free Intro Self-Defense Class – Maryland Systema** Want to learn how to protect yourself while also improving your health, focus, and confidence? Join us for a free first class at **Maryland Systema**, a unique approach to self-defense that blends both physical and mental training. *** ### **Why This Class is Different** Unlike most programs that only teach physical moves, Systema trains your body **and** your mind. You’ll explore: * **Structure** – staying balanced under pressure * **Breathing** – keeping calm and controlling fear * **Relaxation** – avoiding panic and wasted energy * **Movement** – adapting naturally to any situation You’ll also learn to read an attacker’s intentions and respond proportionately—aligned with Maryland’s self-defense laws. *** ### **What You’ll Gain** ✔ Practical skills you can use right away ✔ Better stress control and awareness ✔ Improved strength, mobility, and coordination ✔ Confidence in handling real-world situations *** ### **Class Info** 📍 **Location:** The Compound, Silver Spring (free parking) 🕒 **Length:** 1.5 hours 👥 **Small Group:** Max 10 students for personalized guidance 👖 **What to Wear:** Comfortable long pants and clothes you can move in 💵 **Cost:** Free for first-time students *** ### **How to Join** RSVP here on Meetup to save your spot, then text Jim at **301-326-9146** to confirm. Spots are limited—once the group fills, we close registration. *** **Maryland Systema** Real-world self-defense training for adults—helping you stay ready, stay calm, and stay safe.

A Pathfinder Society Scenario designed for 1st through 4th level characters. With war breaking out, the gnomes of Brastlewark in Cheliax can no longer cling to their carefree ways. Self-proclaimed King Drum Thornfiddle is eager to ingratiate himself to Queen Abrogail, and so conscripts the city's magical and creative resources towards the war effort. A few gnomes have broken free, and they have brought evidence of the various works being created in Brastlewark. They're no fighters, though. It'll be up to the Pathfinders to get them safely across the border to Andoran and freedom. Written by Elizabeth V Nold. Scenario Tags: Metaplot (Battle's Spark)

**✅ First class is FREE – only 10 spots available!** Learn real self-defense skills in a small-group setting. No experience needed, open to all adults. 📲 RSVP now and text Jim at **301-326-9146** to confirm—once spots are gone, they’re gone. *** ## **Free Intro Self-Defense Class – Maryland Systema** Want to learn how to protect yourself while also improving your health, focus, and confidence? Join us for a free first class at **Maryland Systema**, a unique approach to self-defense that blends both physical and mental training. *** ### **Why This Class is Different** Unlike most programs that only teach physical moves, Systema trains your body **and** your mind. You’ll explore: * **Structure** – staying balanced under pressure * **Breathing** – keeping calm and controlling fear * **Relaxation** – avoiding panic and wasted energy * **Movement** – adapting naturally to any situation You’ll also learn to read an attacker’s intentions and respond proportionately—aligned with Maryland’s self-defense laws. *** ### **What You’ll Gain** ✔ Practical skills you can use right away ✔ Better stress control and awareness ✔ Improved strength, mobility, and coordination ✔ Confidence in handling real-world situations *** ### **Class Info** 📍 **Location:** Dance Exchange, Takoma Park (free parking) 🕒 **Length:** 1.5 hours 👥 **Small Group:** Max 10 students for personalized guidance 👖 **What to Wear:** Comfortable long pants and clothes you can move in 💵 **Cost:** Free for first-time students *** ### **How to Join** RSVP here on Meetup to save your spot, then text Jim at **301-326-9146** to confirm. Spots are limited—once the group fills, we close registration. *** **Maryland Systema** Real-world self-defense training for adults—helping you stay ready, stay calm, and stay safe.

We had a wonderful session in September so let’s do it again! A Reiki Circle this is a gathering of Reiki practitioners who work in a group to provide Reiki treatments on each other. The main purpose of the Reiki share is to give and receive Reiki in a casual atmosphere of friendship, encouragement, and positive energy. We will share our wisdom and skills, socialize and make new friends in this Reiki community. Space is limited to 10 people. We will see if we need to grow or shrink from there. Let us know if you have and questions! See you there! Shaman Phil

Monday December 29th at 6PM we'll be meeting up dinner at the Pies & Pints at Easton. Feel free to bring guests. Sandwiches run about $15 and large pizzas run $20-30.

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.

Time for a Holiday PJ party! Wear your best holiday PJ, or Holiday Sweater. Prizes to be had for 'Best Dressed". Come chat about Atlassian tools and best practices at the Polaris Sunny Street Cafe and Breakfast is on Atlassian! Let's get the day started off with breakfast with your ACE Leaders! We're always excited to talk about Atlassian Products, share our knowledge and hand out swag! Come chat with us about new product news and anything you are working on within the Atlassian product stack. This is a great opportunity to come see what we are all about, hear new business news and share with other Atlassian users your questions and experiences. We'd love to see new and old friends come out to chat and learn about Atlassian! Agenda --- Moderators Kevin Stanley - Columbus Atlassian User Group Leader Kimberly Deal - Columbus Atlassian User Group Leader Hosted By Kimberly Deal, Atlassian User Group Leader Kevin Stanley, Chief Everything Greg Sprowls, Agility Lead --- Global Partner Atlassian (http://atlassian.com) Millions of users globally rely on Atlassian products every day for improving software development, project management, collaboration, and code quality. Partner Atlassian --- For over a decade, Atlassian customers have come together to network, share ideas, solve problems, and find new ways to use Atlassian products. Today, more than 15,000 people take part in Atlassian community events in more than 30 countries. --- Complete your event RSVP here: https://ace.atlassian.com/events/details/atlassian-columbus-presents-rise-and-shine-with-atlassian-polaris-11/.

This special holiday event will be AT GAMEARENA near the Gateway!!! Come with games if you like but also come just to chill and relax with new and old friends before we end the 2025 year. Snacks will be provided and working to get holiday drinks like last year if you would like partake more at the bar. Play game at the main venue or other games COGG members bring! \-\-\- **Usual In-Person Notes** \-\-\- **Attendees:** Don't have a game to show? Not a problem! All are welcomed and invited from all ages and backgrounds. The more we can have to play test our games the better! **Developers:** Do you have a game that you would like to get critical feedback on? Would you like an excuse to work on a game with other talented artists, programmers, musicians, designers, and writers? Digital, table-top, non-experienced developers, and the like are welcomed! We'll provide signage for your game to help others learn more about your work. Wifi, outlets, tables, and seats (though standing tables also) are available. Come to the Prototype and Play workshop to collaborate and meet local game developers for an evening of epic and raw game play fun! Play works-in-progress, show off your own game, work with others to add polish to a game, or even lend your talents to other fellow developers. For this event, light snacks from the bar and water will be provided! Though you can purchase you own if you like at the bar: [https://www.game-arena.co/menu](https://www.game-arena.co/menu) Can use South Garage at the Gateway with a $5 voucher on your way out. 75 E 11th Ave, Columbus, OH 43201 [https://maps.app.goo.gl/UwgveUYG37Jy7RtS9](https://maps.app.goo.gl/UwgveUYG37Jy7RtS9) If you have any questions or comments, as always, feel free to reach out to us at info@[thecogg.com](http://thecogg.com/)!

Some trained COUNT volunteers work together once a month at RMH (http://www.rmhc-centralohio.org/volunteer.php) as Housewarmers (usually on the 1st Sunday from 1 – 5 PM). Some schedule other shifts at their convenience. You may try this out with less fuss by following a "Fast track" or go through the normal process. Fast track • Arrange a time to shadow a COUNT volunteer. Call Dave Nohle at 614-268-9558 (cell). • Show up and try it out. • Complete application, etc. later. Normal process • Complete an online application (http://rmhc-centralohio.org/volunteer/). • Attend orientation in advance. • At orientation you will complete forms agreeing to keep family/patient info private and allowing a background check and tour the facility. • Complete one training shift. Daily shifts are: morning 9 AM - 1 PM, afternoon 1 - 5 PM and evening 5 - 9 PM. • Schedule shifts online using the on the RMH scheduling system (http://www.volgistics.com/ex/portal.dll/?FROM=32895). The Ronald McDonald House (RMH) provides housing and meals for families with sick children. The Columbus RMH is the largest in the world with 137 rooms. COUNT has been volunteering there since May 2014. Housewarmers work with RMH guests to provide a home-like environment - greet, assist with family needs, answer phones, give tours, assist with checkin/checkout, prepare guest rooms after checkout, clean facility, laundry, restock supplies and staff the front desk. RMH Housewarmers volunteer at least one four-hour shift a month. All Housewarmers must complete an application and agree to a background check before they can be full fledged volunteers.

Sleep in on Sundays. When you've had your fill of pajama-time, roll out and have some tasty brunch with your fellow Humanists!