Best DC Dive Bars

I saw this link in Wonkette about the best Dive Bars in DC from Gridskipper. Mt. Pleasant’s the Raven is number one, Columbia Height’s Wonderland is number four and U St.’s Polly’s is number six. What’s your favorite Dive Bar? While I don’t like the use of the term Dive Bar, while new, my vote would definitely be the Red Derby.