this is not a journal title

My Halloween party this year will be Saturday Oct 25 (Saturday before Halloween), and I need a theme to revive it - last year there was very little dressing in costume. I'm considering "Dance" and "Cosplay" as themes, b/c I want to have dance music, and b/c I want to make a Rinoa (Final Fantasy) costume, but I don't know if I like them for others' use. Got any other ideas?