There are a number of good ones. First, here's a listing from CREOnline.
I know of, but don't regularly attend, the Capital Area REIA.
I do know and attend DC/VA REIG--recently renamed the Virginia REIG. That's meeting on Saturday, July 19. It's a good one--monthly meetings, basic membership free. Lot of good information along with the pitches. It also has a pretty good weekly "deal alert."
I also know and belong to Real Estate CNG. It now uses a combination of meetings, teleseminars, and other methods. It gets a smaller turnout than the one above, but it's useful.
I've never attended Todd Morgan's Millionaire Networking Group in Sterling, but I do know Todd and, on that basis, can recommend it.
Here's the listing for Maryland clubs:
I don't know these as well. However, I do know Charlie Parrish. He runs an expensive mentoring program, but he's very sharp and knows his stuff.
Sherman Ragland isn't on any of the lists, but he's very active. His link is: http://www.shermanragland.com/
Each of the groups has its own "feel." Some are a lot more into promoting books and courses than others. And some have more newbies than others. Try out any on the lists. Maybe start with the ones I mentioned. Attend a meeting or two of any that seem to fill the bill. And feel free to contact me off line.
Hope that helps.