Quantitative Finance

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

We are the ONLY modern western square dance club in Washington, DC. [DC Lambda Squares](https://dclambdasquares.org/) welcomes singles, couples, of any orientation. We provide an energetic activity that encourages smiles, promotes friendship, and is a ticket to the hip, social world of square dancing. All are welcome to come and dance with us - No Partners Needed. Go to our website to find square dance classes, and a calendar to confirm that we are dancing on the night you want to attend. ***See You on the Dance Floor!*** ### [Check out our event calendar](https://dclambdasquares.org/calender/)

• What we'll do Economist William Michael Cunningham on Podbeam Thursdays at 6 pm. https://www.podbean.com/

Join us every Thursday for Beginner Friendly Social Classes and Social Ballroom Dancing. All is welcome and no partner is necessary. You will learn 2 dances per month in our beginner friendly classes every Thursday. 7:00 Pm Beginner Smooth (Waltz, Tango, or Foxtrot). Please see website schedule for dances of the month. 8:00 Pm Beginner Rhythm (Cha Cha, Rumba, or Swing). Please Check Schedule. 9:00 pm - 10:30 Pm Social dancing. Yearly Schedule: Jan, Apr, July, Oct: Foxtrot and Swing Feb, May, Aug, Nov: Waltz and Cha Cha Mar, June, Sep, Dec: Tango and Rumba [Register for Classes Here 📌](https://crowndancestudio.com/group-classes/) * Please visit our website in the link above to register and claim your free intro offer for first time visitors. \*You MUST register online to claim the free offer!! Select “Intro offer.” \*The RSVP here does not reflect the size of our classes. We have e at least 15 members each week. And the number is growing.

Please join members of the the Arlington Running Club each Thursday night at 6:30 PM for our weekly Run 'n' Quaff at Astro Beer Hall located at 4001 Campbell Avenue, Arlington Virginia 22206 in the Shirlington neighborhood of Arlington, Virginia. We are a laid back group of runners that enjoys running a 5-K (3.1 mile) course each week followed the quaffing of cold refreshing adult beverages. We have runners of all abilities from the beginning runner / walker up through marathoners and ultra runners. Our age group spans from early twenties through late seventies and all ages in between. There is someone your age range / someone your skill level at our weekly meetups. No check-ins, waiver forms, or administrivia. No rules, just right. Please join us each and every Thursday night, rain or shine, for the Arlington Running Club!

**The concert has been cancelled due to the forecasted extreme heat** The band Bansy will be part of the Summer Concert Series I. Bethesda. Their set list spans genres and generations. They blend classic guitar anthems with today’s most popular pop hits. With multiple lead vocalists, instrument switching, and an energetic, interactive stage presence, they focus on keeping the crowd engaged, singing along, and having a great time from start to finish. Bring a chair. Try to get there early to help me grab some tables.

Come learn how money really works. We’ll cover how to grow it, protect it, get out of debt, and use smart retirement and infinite banking strategies to build long-term security.

🇺🇸 Fireworks & Finances – 4th of July Brunch 🇺🇸 Celebrate Independence Day while investing in your financial future! Join us for a free brunch featuring great food, mimosas (21+), meaningful conversations, and practical financial education. Connect with like-minded people, learn strategies to build long-term wealth, and enjoy a fun, festive atmosphere before the fireworks begin. 📍 3901 Calverton Blvd, Beltsville, MD 20705 🕙 10:00 AM 🎟️ Free to attend (RSVP required) Good Food. Great People. Better Finances. Space is limited—reserve your spot today!

SSB family, we’re heading out for a high-energy night of live music, dancing, and nonstop throwback vibes. On stage: Quantum Leap - a professional 80s tribute band bringing the best of pop, rock, dance, and R&B hits from the decade that knew how to party.

One of our favorite bands in playing this Friday. Tell them at the gate you are there for the band and they will direct you to the terrace bistro.

We go all over Virginia and canvass all cities. This is Old Town's turn and here we come Old Town! * * Drink specials including the usual suspect Mer-Tini:) * Event is 21+ * Come one, come all; this is the most friendliest event you have ever attended! * Feel free to invite your friends. They don't necessarily have to be a member METRO & PARKING INFO Closest Metro Station is King Street. Street Parking might be a challenge AND the event involves drinking. We highly encourage you to take a taxi service or a ride share. DRINK RESPONSIBLY.

Join us for a discussion of ***The Anthropocene Reviewed: Essays on a Human-Centered Planet* by John Green.** Here's the summary: The Anthropocene is the current geological age, in which human activity has profoundly shaped the planet and its biodiversity. In this remarkable symphony of essays adapted and expanded from his ground-breaking, critically acclaimed podcast, John Green reviews different facets of the human-centered planet - from the QWERTY keyboard and Halley's Comet to Penguins of Madagascar - on a five-star scale. Complex and rich with detail, the Anthropocene's reviews have been praised as 'observations that double as exercises in memoiristic empathy', with over 10 million lifetime downloads. John Green's gift for storytelling shines throughout this artfully curated collection about the shared human experience; it includes beloved essays along with six all-new pieces exclusive to the book. **Let’s meet at Caboose Commons in Fairfax to enjoy some good discussion and meet new friends.**

NFT's are here to stay folks! This is a group for like minded people interested in understanding, leveraging, using, creating for, profiting from, trading too i suppose, NFT's.. everything around them, complexity, fear and exploits, best practices and more. **PLUS** This group will talk AI ART tools, techniques, artists, video, audio, prototypes and more in the AI assisted production space- ART specifically, but we can get into any aspect of some of the cooler things happening in AI in general.

**Welcome to the Women’s Columbus Bogleheads® Sub-Group** This sub-group is for **women who want to learn and discuss finances in a safe, supportive space**. For those interested in moving towards financial independence and retirement by learning investment basics, choosing your 401(k) investments, minimizing taxes, and more. We’re a local chapter of **Bogleheads®**, following a long-term, practical investment philosophy: [Investment Philosophy](https://www.bogleheads.org/wiki/Bogleheads%C2%AE_investment_philosophy): https://www.bogleheads.org/wiki/Bogleheads%C2%AE_investment_philosophy [Bogleheads Forum](https://www.bogleheads.org/index.php): https://www.bogleheads.org/index.php No question is too small, and no experience is too simple. Share, ask, and learn — at your own pace, without judgment, in a group of like-minded women. Let’s build confidence and knowledge **together**!

Let’s meet and discuss John Updike's Rabbit, Run, the first in his series of four novels following the life, hopes, and disappointments of former local basketball star, Harry "Rabbit" Angstrom, as he fitfully confronts and evades adulthood.

If you are interested in selecting investment choices for your 401(k) or other workplace savings plan, minimizing your income tax liability, or identifying the most effective investments for your brokerage account, we are the group for you. We are a local chapter of Bogleheads, whose investment strategy can be found here: https://www.bogleheads.org/wiki/Bogleheads%C2%AE_investment_philosophy Or you can peruse the Boglehead forum here: https://www.bogleheads.org/index.php I look forward to seeing you there. Mark Vonder Haar

**Practical Curiosity: Learning from Everyday Data** How do we actually get better at utilizing our day-to-day data? Fancy dashboards and complex models might look nice and draw attention, but that’s not where most of us spend our time. In fact those shiny outputs frequently sit unused, while the real insights are drawn from the analyst’s daily practice. Sometimes it’s as simple and as powerful as noticing that a segment is shrinking, a channel is underused, or certain links keep getting all the clicks. There’s many different places that the spark of insight can come from, but you have to keep your head in the data and know where to look. In this session, we’ll explore real-world examples of how segmentation, testing, and click behavior can uncover practical digital marketing opportunities. You’ll leave with inspiration for your own use cases, along with a few simple ways to ask better questions, spot meaningful patterns, and make smarter decisions without overcomplicating it. **About Our Speaker:** [Elaine Armbruster](https://www.linkedin.com/in/elainearmbruster/) is a Director of Digital Experience at the [American Diabetes Association](https://diabetes.org/), where she focuses on using data and insights to create smarter, more effective digital experiences. A lifelong Columbus resident, she has built her career in email marketing and the broader digital user journey, and is finding she most enjoys working in the messy middle where systems, data, and big ideas don’t quite line up yet. Thanks to our 2026 sponsors: [Clarivoy](https://www.clarivoy.com), [What Box Consulting Group](https://www.whatboxconsultinggroup.com), [Conductrics](https://www.conductrics.com), and [Piwik PRO](https://piwik.pro) More info at [cbusdaw.com](https://cbusdaw.com)

Start your week the right way with Manic Mondays. Giving you an enjoyable Bachata lesson with a push of cool moves. The second hour has Beginner/Intermediate Salsa on 1. You must understand basic Salsa skills to participate. 730pm-830pm Bachata Cool Moves 830pm-930pm Salsa On 1 (Beginner/Intermediate) 15 for One Class 20 for Both Free Parking & Plenty of Dance Space. Viva Dance Columbus 2809 Festival Lane Dublin OH 43017

Most people use LLMs by feel: ask a question, read the answer, decide whether it “seems good,” and move on. That works for casual use. It does not work when you are building software, automating workflows, writing important documents, or relying on AI for anything that needs to be repeatable. In this talk, we’ll look at how to improve and evaluate the inputs and outputs of LLMs using practical measurement techniques. We’ll cover how prompt changes affect results, how to compare outputs, how to build simple evaluation sets, and how math-based methods like similarity scoring can help you move beyond guesswork. This will be beginner-friendly, so even if you don't know anything about AI, you should get something out of it. However, this will be a little more technical than our intro talks. You do not need to be an AI researcher, but programmers and technically curious attendees will get a lot out of it. We’ll cover: * Why “it looks good” is not enough * How to improve prompts by changing the input, context, and constraints * How to compare LLM outputs more systematically * Basic evaluation techniques for accuracy, consistency, and usefulness * How embeddings, cosine similarity, and scoring can help evaluate results * Where automated evaluation works — and where humans still need to stay in the loop By the end, you’ll have a practical mental model for treating LLMs less like magic and more like systems you can test, measure, and improve. 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.