Microbreweries are growing and growing. One of the latest is in Rockville, MD (just outside of DC), 7 Locks Brewing.
(logo source: 7locksbrewing.com)
They have a nice spread of beer on tap, which can of course always change.
When I checked it out, my friend and I split of flight of 6 (4 oz each), which is only $8. We also did this because they were sponsoring a 5K that we had to run not to long after we were going to enjoy the brew. All were nice to try, not all were my (personal) favorites.
The brewery is great because they have lots of events, from runs to concerts to yoga, and more, all including beer. Can’t go wrong with that.