Sure are! What area of
DC are you in? Also, what games do you play (I'm guessing
40k from your sig

)
I live in Lorton, so most of my gaming is done south of the Beltway at Eagle & Empire in Alexandria, the
GW store in Springfield, and occasionaly the Game Vault down in Fredricksburg, VA.
There is also another store out by Dulles, called Game Parlor. They have a huge playing area, and are pretty active with
40k from what I've heard. Inside the beltway, the only store I've been to is Victory Comics, in Falls Church off Chain Bridge Road. As the name suggests, that store is very comic book oriented, but they have a playing area and also support table top gaming.
You might also want to look at joining the Iron Fist League, which is a very active
DC area
40k club:
www.ironfistleague.com