MapReduce

We'll check out Shaghf Cafe in Fairfax. There is a retail parking around the block and behind the building. Please have a picture profile so we can recognize you in the meetup. Please only sign up if you're sure about attending this meetup, and please update your RSVP as soon as possible if you need to cancel, thank you!

**NOTE TO PROSPECTIVE RIDERS; RIDE MAY BE CANCELLED IN THE EVENT OF LOW INTEREST/SIGN-UP.** [https://ridewithgps.com/routes/45899232](https://ridewithgps.com/routes/45899232) 26.1 miles. Lunch is at the Great Falls overlook 18.2 miles into the ride. There are toilets at Great Falls and Fletchers' Boathouse. We will e-bike from Glen Echo Park in Maryland to the majestic Great Falls. We will be biking on the Capital Crescent Trail, the C&O Canal pathway, and McArthur Blvd with separate biking lanes. This tour captures the essence of adventure and natural beauty. We will be meandering alongside the serene Potomac River and the C&O Canal, offering E-bike Lovers an unparalleled opportunity to immerse themselves in the lush landscapes that define this region. Glen Echo Park, with its rich tapestry of cultural and artistic heritage, serves as the perfect prologue to a journey that gradually unfolds into the wild, untamed beauty of the Great Falls. The route is just over 26 miles on gravel and asphalt. The gravel is compact. If you don't like the gravel on the C&O Canal pathway, this is not your route. Entrance to the Great Falls National Park is for free as we enter from the C&O Canal. We park at the large parking lot off Oxford Street, NOT at the smaller lot at McArthur Blvd. Please bring snacks, lunch and plenty of water. FYI: Ride With GPS E-bike Lovers Club membership is now for free as [www.ebikelovers.com](http://www.ebikelovers.com/) generates sufficient income from ads to cover the costs. Here is the link to activate your free membership: [https://ridewithgps.com/auto_approve/Club/6746/Zwa5jhttF5mJrFbN](https://ridewithgps.com/auto_approve/Club/6746/Zwa5jhttF5mJrFbN) The group stops a few times for slower riders to catch up. **REMEMBER:** This is a self-guided event. This event empowers each participant to take the lead, as there are no designated bike leaders within E-bike Lovers. We all embrace the role of leaders in this self-guided experience. Please RSVP only if you are coming so we know how many E-bike Lovers will participate. We enjoy a nearly 100% RSVP success rate. Thank you so much for your help! As usual, non-assisted bikers are most welcome. DISCLAIMER LIMITATION OF LIABILITY: TO THE FULLEST EXTENT PERMISSIBLE PURSUANT TO APPLICABLE LAW, NEITHER GREGORY MAASSEN, NATHAN MERRIS, RICHARD CAMER TRIP COORDINATORS, THEIR AFFILIATES, FAMILY AND FORMER AND CURRENT EMPLOYERS NOR ANY OTHER PARTY INVOLVED IN CREATING, PRODUCING, OR DELIVERING E-BIKE LOVERS GUIDES, OUR MEETUP EVENTS, AND THE GPS E-TRAILS IS LIABLE FOR ANY DIRECT, INCIDENTAL, CONSEQUENTIAL, INDIRECT, EXEMPLARY, OR PUNITIVE DAMAGES ARISING OUT OF A USER’S ACCESS TO, OR USE OF THE E-BIKE LOVERS GUIDES, OUR MEETUP EVENTS, AND THE GPS E-TRAILS. See for the full disclaimer: https://ebikelovers.com/disclaimer

*Location Change * Since Freedom Plaza is under construction, we will meet at the plaza in front of The International Trade Center near the National Children's Museum (on Pennsylvania Ave). We'll begin with going over a few drills (varies week to week). The skills we drill will be for the first 30 minutes. For the second half, we will casually skate down the bike lanes on Pennsylvania Avenue from the plaza to the U.S.Capitol and stop at 3rd St. and then skate back the same route. This route is about 2 miles in total and is perfect for those who are new to skating in the city but feel comfortable on skates in a parking lot or roller rink. This is also great if you wish to start with shorter routes to increase your physical fitness or stamina for some of the other routes. This is an excellent opportunity to prepare to skate with others on the road. You will also get to meet skaters who will arrive for the Intermediate and Advanced skate routes following the introductory skate. This is great training to feel prepared for the Tuesday Night and Friday Night Skate! Route: http://www.gmap-pedometer.com/?r=7653831 Inline skates (rollerblades), roller skates (quads), bicycles, unicycles, skateboards, longboards and other similar modes of transportation are welcome to join. Helmet and pads are required. Skate at your own risk.

King Soul delivers old-school Southern Soul with original songs, powerhouse vocals, and a killer horn section. Featuring all-star musicians from top DC bands and boasting 30+ Wammies and Austin Music Awards, they’re a premier draw at clubs and events. Bring a chair. We will sit near the front on the right facing the stage.

🌈✨ Come One, Come All to the 18th Annual Holi Hungama! ✨🌈 Join us as we celebrate the Festival of Holi with vibrant gulal (colored powder), delicious food & drinks, and LOTS of fun at this family-friendly event! 📅 March 29th ⏰ 1:00 PM – 3:00 PM 📍 Quincy Park (Picnic Area), Arlington Wear your best whites and get ready to get colorful! Bring your friends, bring your kids — the more the merrier! 🎉 🚗 Ample street & park lot parking available 🚇 Just a few blocks from Virginia Square Metro (Orange Line) What to Bring: 🌸 Gulal (colored powder) — available at Indian grocery stores or Amazon 🥗 A food or non-alcoholic drink item (per park rules) 🪑 Picnic blankets/lawn chairs 🎯 Outdoor games 📸 Cameras (keep them in a plastic bag!) 🧴 Towel + change of clothes 💧 Water balloons & water guns 💡 Pro Tip: Apply baby oil or Vaseline on your skin beforehand to make color removal easier. Nail polish helps prevent staining on nails! Want to Help? We’d love extra hands with: • Event setup (moving benches, tablecloths) • Keeping the park clean during the event • Cleanup & packing up afterward Let’s make this Holi brighter than ever! 🌈✨ See you there!

Greetings conscious black friends! I am Cody V, and I recently completed my 40 minute short film called Purple Velvet Planet. A lot of creatives here in the DMV worked hard on it, and we are excited to premier it Sunday March 29th at the historic AFI Silver Theatre in Silver Spring. The film is a blend of story, music, and self discovery. We've been getting tons of positive feedback so far. Tickets are available at purplevelvetplanet.eventbrite.com and they start at $7. Check out the trailer and the synopsis. I hope to see you there! **TRAILER** https://www.youtube.com/watch?v=3qd69fWFfxU **SYNOPSIS** *In a world where music is regulated, performances are monitored by the government, and musicians need registrations to perform in public venues, Light is an “undocumented” rapper with few options for success. His socially conscious lyrics aren't doing him any favors, either. Speaking to many of the issues we are facing today, this film will appeal to music lovers, film aficionados, and everyone searching for ways to be more joyous in these troubling times. Purple Velvet Planet aspires to provide a path to personal peace amidst the chaos, through a masterful blend of music and story.*

If you’ve already learned the basics of volleyball and want to keep improving your skills while having fun, this event is for you! **Number of Nets:** 3 **How to find us:** Park in the South Bluemont Parking Area and walk toward the south end of the lot. Near the end, you’ll see a bridge on your left—cross it. We’ll be on the field to the left of the picnic pavilion. **Skill Level:** Advanced Beginner (click [here](https://docs.google.com/document/d/1PojSi4qdlRsv1msCHhvpQ43iDc4FfzQwpWCc3kafVMY/mobilebasic) for details). **Reminders** 1. Attendance: We’ve noticed that the waitlist is growing, so please make sure your name is on the Going list if you plan to play. Our number of nets is limited so this helps avoid too many rotations. If your name is on the list but you don’t show up, it will count as an absence according to Smiley Social rules. Please update your RSVP at least 12 hours in advance if your plans change. 2. Injuries: Play safely and be mindful of others on the court. Respect positions and avoid risky moves that could lead to injury. If you’re not sure the ball is yours, call it before going for it to avoid collisions. 3. Game Rules: Let’s follow the basic volleyball rules, especially the three-touch rule so we can play properly and improve as a team! **Smiley Social documents:** 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/)

Join our ASL Brunch on Sundays in Greenbelt! All ASL users and learners are welcome. Brunches are alternately held at two restaurants in Greenbelt, both in the same town plaza. ODD WEEKS: 1st, 3rd, and 5th Sundays, we meet at Cedars of Lebanon, 103 Centerway. EVEN WEEKS: 2nd and 4th Sundays, we meet at New Deal Café,113 Centerway. We are the Greenbelt ASL Community, a group of both Deaf and hearing people who hang out, chat about everyday goings on, trade stories, get to know each other better, and of course, enjoy food together. Many members use ASL as their primary language, several are interpreters or other fluent ASL users, while others are ASL learners who wish to improve their skills while making new friends. Before or after brunch, you can visit the farmer's market and small coop grocery store in the plaza. Please RSVP so we can contact you via email if needed. Our group is on Facebook as Greenbelt ASL Community. Some longtime Brunch attendees don't mark their attendance here, so feel free to stop by even if you don't see others who have RSVP'd on Meet-up.

A day in paradise. The PATC, in coordination with the Virginia Native Plant Society, will be conducting a invasive plant removal day at Thompson Wildlife Management area near Linden, Virginia from 10AM - 3:00 PM. This area is one of the most outstanding botanical sites in the Virginia Blue Ridge. Unfortunately, the native flora of Thompson is increasingly threatened by non-native invasive plant species. On March 21st, we'll concentrate our efforts on pulling garlic mustard (*Alliaria petioilata*) rosettes. No prior experience is necessary. Training will be provided on-site. Please bring seasonal appropriate clothing (never forget rain gear), gloves, water, a sack lunch and a small trowel if you have one. Be prepared to hike several miles and squat or bend over repeatedly - all with the satisfaction that you are helping to protect a truly special natural area. We will meet at the the first Thompson Wildlife parking area on the right just north of the Fox Meadow winery on Freezeland Rd. GPS Coordinates are 38.9397° N 78.039°W. Look for PATC sign. https://maps.app.goo.gl/xaPANbEa7awF6m36A Questions? Email Natural_Resource@patc.net From the east: Take I-66 West to exit18 (toward Markham). Left on VA-688 Right on VA-55W (4.2m). Right on State Rte 638 -Freezeland Rd. Parking lot will be on right (3.8m) From the west: Take I-66 East to exit 13 for VA-79 toward Linden/VA-55. Right onto VA-79S. Left onto VA-55E (1.3m). Left onto State Rte 638 – Freezeland Rd. Parking lot will be on right (3.8 m)

📚 Do you love reading, but wish you had a structure and a community to share your insights with? Join our small circle of curious minds (just 4 members per gathering) as we come together for an hour of focused reading—in the calm setting of a library or the cozy atmosphere of a café. Here’s how it works: First part: Quiet reading on your own—bring a book you’re exploring, whether it’s philosophy, history, psychology, literature, or anything meaningful to you. Second part: We regroup and each person shares key takeaways, insights, or questions sparked by their reading. This sparks a structured yet free-flowing conversation around ideas, perspectives, and personal reflections. Why join? Add structure to your reading habit. Discover new books, authors, and ideas through others’ choices. Build real connections by sharing and listening deeply. Socialize around something meaningful instead of small talk.

​​**Let's discuss a ted talk video while taking a walk at Capital Crescent Trail Near Bethesda.** **To receive future event updates, register on Luma:** [https://luma.com/tv3fhasq](https://luma.com/tv3fhasq) Have you had your daily dose of fun? It's not just enjoyable, it's also essential for your health and happiness, says science journalist Catherine Price. She proposes a new definition of fun -- what she calls "true fun" -- and shares easy, evidence-backed ways to weave playfulness, flow and connection into your everyday life. ​​​​Here is how it works: * ​​​​​​​Prior to the event: **Please watch this YouTube video:** [https://www.youtube.com/watch?v=iMBJrvEwv8s](https://www.youtube.com/watch?v=iMBJrvEwv8s) * ​During the event: * ​​3:30pm-3:45pm: meet outside of [Chopt Salad](https://maps.app.goo.gl/ThxMNixG2TG4T32X6) (Bethesda Row end of Capital Crescent Trail) for group introduction. * ​3:45pm-4:45pm: Take a walk at Capital Crescent Trail (laps between Bethesda Row and Little Falls Parkway) and Discuss. * ​(Walking Route Link: [https://scenic-walk.com/#/b712c5fa ](https://scenic-walk.com/#/b712c5fa)(During the hike, the organizer will live broadcast current location, so that people who arrive late can catch up via the [Scenic Walk Link](https://scenic-walk.com/#/b712c5fa)). * ​4:45pm - 5pm: Group Conclusion outside of Chopt Salad. *** ​​​​Discussion Questions During Walk: \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- 1. **True fun is a visceral feeling of being illuminated from within rather than just a leisure activity. How can we better distinguish between activities that merely pass the time and those that truly make us feel radiant?** 2. **Playfulness involves a lighthearted attitude of doing things for their own sake without worrying about the outcome. How might our community change if we collectively lowered our guards and let go of the need for perfection?** 3. **Most peak fun memories involve a shared experience that helps us feel united with others. In a polarized world, how can the pursuit of fun serve as a bridge to connect us as human beings?** 4. **Fun requires a state of flow where we are so engaged that we lose track of time. What environments can we create together that naturally encourage us to be fully present and focused on the moment?** 5. **Prioritizing fun acts as a legitimate health intervention by reducing stress and promoting social bonding. How would we shift our schedules if we viewed joyful moments as essential to our physical and mental well-being?** 6. **Constant digital distractions interrupt our flow and prevent us from forming real-world connections. What boundaries can we set with our devices to ensure we remain available for spontaneous moments of joy?** \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- To provide an enjoyable experience for fellow participants, here are three ground rules during discussion events: 1. Step up and step back. (If you feel that you’ve been talking too much, step back to listen more. If you feel that you’ve been relatively quiet, step up to share your perspective or ask a question) 2. Listen to understand, not to respond. 3. Be open-minded and value differences.

Let's get together for a three-course fix price brunch at Opal, a super cute, welcoming restaurant in Chevy Chase DC. Opal is owned by restaurateurs Chef Colin McClimans and Danilo Simic -who also own Nina May. A globally inspired menu, Chef uses spices and techniques influenced by cultures including Asian, European, and South American. We are getting together for a **three-course fix price brunch** for **$39**. Opal also offer bottomless drinks for $17. Take a look at the [brunch menu](https://www.opal-dc.com/_files/ugd/45d23f_92ff5e9ad2574a7eaf6a33dbb9a70fcb.pdf) for a sneak peek. IMPORTANT INFORMATION: * **CASH only.** * **Sign up only if you can commit. Do not sign up if you are a maybe.** * If your plans change, update your RSVP even if you are in the Waitlist. * Individuals that don't show or cancel in the last 24 hours will not be able to join future events organized by me in 2026. * Three days before the event, I will ask everyone in the Going list to confirm they are attending. I will ask everyone to confirm by the end of the day. Individuals that do not respond/confirm will be removed from the list and I will ask who in the Waitlist would like to join. * The organizer reserves the right to change, cancel, and/or manage the event as they see fit. Looking forward to seeing you at Opal!

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.

Jimmy V's Grill & Pub in Grandview Heights. You are responsible for your own meal/drinks. We usually don't have any agenda other than eat, drink and talk. :) If the weather is nice we will be on the back patio, otherwise we are in the cigar room. This group has been meeting every Tuesday evening for over a decade. Many attendees do not RSVP on meetup. Please don't let the small number here discourage you. Anyone/everyone is welcome to come. We'd love to have you join us. COTA bus #5 comes to W. 5th and Wyandotte Rd. And it's a minute walk to the restaurant. Did you know that there are atheists everywhere?!?! You may not know it, but we are! We're in your schools, diners, police force, military, government, and some are even still in your churches! So come and join us and meet other local atheists, along with agnostics, heathens, humanists, skeptics, and anyone else who's 'hell bound'! Vision: a Central Ohio that accepts atheism as a viable alternative in all areas of public and private life. Mission: grow, support, and provide community for atheists in Central Ohio. Social meetings held most Tuesdays at a local pub/restaurant at 7:00 PM (and often into the wee hours). Attendees call themselves agnostics, skeptics, humanists, non-theists, deists or even theists. All attendees are welcome but should support our vision. Atheists of Columbus (AoC) is part of Omnipresent Atheists (OA). AoC members are invited to join this OA meetup and/or OA Facebook group ( https://www.facebook.com/groups/omnipresentatheists/ ) but are free to continue conversations on the AoC Facebook group ( https://www.facebook.com/groups/columbusatheists/ ). AoC was founded in 2012 as a networking, social group for Central Ohio area humanists, skeptics, atheists, agnostics, nonbelievers, freethinkers, and the curious. It was a member of Columbus CoR and held weekly meetings, mostly on Fridays, for several years but then operated as an online only group for some time. In November 2018, Omnipresent Atheists (OA), a group that routinely meets on Tuesdays, invited AoC to merge. Omnipresent Atheists is a member of the Columbus Coalition of Reason (ColumbusCoR.org). Omnipresent Atheists is a member of the Columbus Coalition of Reason ( http://www.ColumbusCoR.org ). Omnipresent Atheists endorses the mission of the Secular Coalition for America ( http://secular.org ). This group has been meeting every Tuesday evening for over a decade. Many attendees do not RSVP on meetup. Please don't let the small number here discourage you. Anyone/everyone is welcome to come. We'd love to have you join us.

**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: Type Annotations with John Cassidy 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

Jimmy V's Grill & Pub in Grandview Heights. You are responsible for your own meal/drinks. We usually don't have any agenda other than eat, drink and talk. :) If the weather is nice we will be on the back patio, otherwise we are in the cigar room. This group has been meeting every Tuesday evening for over a decade. Many attendees do not RSVP on meetup. Please don't let the small number here discourage you. Anyone/everyone is welcome to come. We'd love to have you join us. COTA bus #5 comes to W. 5th and Wyandotte Rd. And it's a minute walk to the restaurant. *** Did you know that there are atheists everywhere?!?! You may not know it, but we are! We're in your schools, diners, police force, military, government, and some are even still in your churches! So come and join us and meet other local atheists, along with agnostics, heathens, humanists, skeptics, and anyone else who's 'hell bound'! Vision: a Central Ohio that accepts atheism as a viable alternative in all areas of public and private life. Mission: grow, support, and provide community for atheists in Central Ohio. Social meetings held most Tuesdays at a local pub/restaurant at 7:00 PM (and often into the wee hours). Attendees call themselves agnostics, skeptics, humanists, non-theists, deists or even theists. All attendees are welcome but should support our vision. Atheists of Columbus (AoC) is part of Omnipresent Atheists (OA). AoC members are invited to join this OA meetup and/or OA Facebook group ( https://www.facebook.com/groups/omnipresentatheists/ ) but are free to continue conversations on the AoC Facebook group ( https://www.facebook.com/groups/columbusatheists/ ). AoC was founded in 2012 as a networking, social group for Central Ohio area humanists, skeptics, atheists, agnostics, nonbelievers, freethinkers, and the curious. It was a member of Columbus CoR and held weekly meetings, mostly on Fridays, for several years but then operated as an online only group for some time. In November 2018, Omnipresent Atheists (OA), a group that routinely meets on Tuesdays, invited AoC to merge. Omnipresent Atheists is a member of the Columbus Coalition of Reason (ColumbusCoR.org). Omnipresent Atheists is a member of the Columbus Coalition of Reason ( http://www.ColumbusCoR.org ). Omnipresent Atheists endorses the mission of the Secular Coalition for America ( http://secular.org ).

Want to be a speaker? submit your talk to our Call for Presenters!!! https://sessionize.com/azure-cbus-2026/

This is an in-person meeting. At this meeting you will get answers to depression and anxiety. Find out the source of them and how to get rid of them. Did you know that unwanted emotions like anxiety, depression, unhappiness, loneliness, hopelessness, anger, fear, or feelings of irritation don’t just fall on you for no reason. They are not random occurrences that simply happen to people's minds. They are definitely not due to a chemical imbalance in your brain from some nebulous chemical reaction "by chance". Your negative emotions are the symptoms of the painful experiences that you have which are not healed, and which are still affecting you. The effects of these painful experiences are exacerbated by the pressures or difficulties of the other problems in your life. Come to our Meetup, where we can introduce you to some of the knowledge, tools and techniques of the breakthroughs in the field of the mind that we can apply to this ever important area of life. 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 created by the Hubbard Dianetics Foundation of Central Ohio and Church of Scientology of Central Ohio.

**First meetup of the Columbus AI Engineering group.** We’ll kick things off with a practical, beginner-friendly discussion on: **How LLMs like ChatGPT actually work — and how to build real applications with them.** We’ll cover: * what’s actually happening under the hood (at a high level) * why LLMs behave the way they do (hallucinations, prompt sensitivity, etc.) * how people are building real systems with them today * where things break in practice This will be a **short, informal talk (\~15–20 min)** followed by open discussion and Q&A. Whether you’re an engineer, builder, or just curious about how modern AI systems work, you’re welcome to join. No slides, no fluff — just real conversation about real systems. We’ll hang out afterward and get to know each other.