I am in Southern Maryland about an hour south of DC. I am not familiar with gyms in DC. There are two Starting Strength gyms in Maryland (Westminster Strength & Conditioning + FiveX3 Training). I have been to Westminster Strength & Conditioning for a SS Seminar and a SS Meet. It is a great gym with so many racks and bars. I have also heard good things about Supreme Sports Performance & Training in Rockville, MD.