Quinn's was stop number two on the beer tour of Capitol Hill. They have 14 beers on tap and focus on trappist beers and Belgians it seems. They have large selection of whiskey and bourbons available, along with lots of liquors. Their food menu is pretty swanky and the vibe of the place is a little higher end. I'd check them out to see what's on tap, but I don't know if I'd sit there for long. On a high note though, it's on quite the interesting corner in the Hill and there is awesome people watching.
Check out Quinn's site for more info.