A few days you don't remember? It must have been that weekend. Believe it or not, that's happened before. I'm not too sure about Rangiku's theory, though.

[ And she never had strange, recurring dreams following the three day memory gap, but that's something that goes left unsaid. ]

Ballet? I don't think I'm familiar with that, but if it's dance you're interested in, you should visit Ecruteak. There's a dance theater there and I'm sure the girls who run it would love to have you.