Ballroom hall with stage and live band for the ball.
Most of the music comes from the 16th or 17th century and the dances are written exactly for a particular piece of music (so if you dance "Trip to Amsterdam", then this is the name of the dance which is directly connected to a song with this title). Since the figures you dance are periodic, but consist of up to ten smaller figures, there's a caller who calls what you're going to do next. But after about three repetitions everybody could memorize the steps at the ball and the caller stopped shouting, so we could listen to the music.