vote for DFH

I personally frequent the alehouse in Falls Church (so much so that the adorable manager gets excited every time boyfriend and I actually show up, now that we've been apart so often and are rarely in DC)
You should try any of the alehouses, but if you get a chance make it to the brewpub and brewery in rehoboth and milton, DE.
April is the month that one of my favorites, Immort Ale is brewed so I'm excited to hopefully see it around soon!