Adult Ballet (and others) in Madrid

[munchkin16]

I'm visiting Madrid for a few days in about a week's time and was thinking it might be really nice to do a class whilst I'm there. Does anyone have any recommendations for a drop in adult ballet class for a low intermediate level? I'll be there Wednesday to Saturday. Also any really good ballet stores as I'm always looking for new leotards! Would love any other ballet themed suggestions of things to do whilst I'm there (or non-ballet related too.)