There's a great gym in Rockville that I go to for coaching. I'd love to train there all the time, but it's too much of a headache dealing with beltway traffic trying to get there from Arlington on weekday evenings. The place is Supreme Sports Performance and Traininghttp://www.supremesportspt.com/. I just started getting coaching from the owner Matt Gary and I'm loving it. The place is great and laid out for serious trainers. Matt's wife, and the co-owner, Souix-z, is a world & national champion powerlifter. I highly recommend contacting them for coaching and making it your gym if you can manage it.
JJ