I managed to take a one-off drawing class the other day where we got to draw a group of young ballet dancers doing bar exercises.  I didn't get as many solid drawings as I would have liked to as the class was very much aimed at folk who hadn't had much experience with life drawing, so we did a lot of expressive exercises where the outcomes were meant to be quite abstract.  It was still a fun class though! a nice change from your typical life drawing classes where the model sits on a stool for two hours.