Hey-- I’ve been pretty happy with the great professional classes CityDance offers for pretty cheap. $10 for ballet on tu/th or Modern m/w with the CityDance Ensemble repertory company is not a bad deal. Instructors seem to cycle through, but not so fast that you don't get to know them and their movement style. It's a nice balance between constancy and new exposure. Very easy to get to the CityDance Center up in Rockville, as well.