For an hour and a half, U Street Music Hall became Studio 54. Contemporary disco band and well-oiled machine Escort came with one goal in mind: to get people dancing on a Friday night. In doing so, the six-piece group, fronted by keyboardist Eugene Cho and singer/bassist Adeline Michele,  took U Hall back a few decades to a time where big hair, light-up dance floors, and funky bass lines ruled the day.