Some of the comments are "iffy" but it's a good round up for the 70s and 80s. When dc and AtBC mentioned Poseurs, I thought about that address. Someone in the attached site mentioned it used to be Mac's. I do remember their cheap (good) dinners.
http://www.fairfaxunderground.com/forum/read/2/510212/page-1.html
The owner of Mac's was also the owner of Poseurs. His daughter gave him the idea for new wave dance club, designed the logo (if memory serves me), and eventually worked at Poseurs, then later at the Big Hunt; I can't remember where she worked in between and I don't know if she's still there because I haven't been there in ages, but the owner of the Big Hunt used to tend bar at Poseurs and then at Fifth Column. That guy's business partner owned Crow Bar, Insect Club, Republic Gardens, whatever was next door to Republic Gardens (I forgot its name), and 15 Minutes; one of the DJ's from Crow ended up opening DC9 with the guys from the Hunt.
Another Poseurs bartender/manager ran the Back Alley theme night every Sunday at Mr Days, and later opened a series of restaurants in Old Town (King Pepper, Flying Fish, maybe something in between).
Poseurs is also where I first met Walter Johnson's grandson, who used to be the bar's bookkeeper and eventually the manager. I dont think I even knew who his grandfather was until his book came out (different last name and all). He's a super nice guy and it's a really good book if you're into baseball history.
It was a very, very, very small world back then. The DCSpace/930 side of the "scene" is even more complicated and intertwined.
Oh and I lived around the corner from Poseurs while it was still Poseurs. Like, literally right around the corner, in what is now the weird pizza-and-curry shop. Trash pickup on Monday mornings sucked with all those bottles getting dumped into the truck right under my window.
