I didn't see anyone in the place but myself. In fact, I saw several of me. The walls were lined with mirrors. The studio itself was long and empty with hardwood floors and a lot of lights in the ceiling. There was a table in the corner with a phonograph player on it, and an upright piano next to it. I guess you don't need anything else to teach dancing. At the back of the studio, in between the panels of mirrors, were a couple of doors. One was marked Restroom, the other Office.
I knocked on the office door...