Dressing demurely, although less lethal, will make people feel more approachable, which is certainly better than having a lot of attention but no one to ask to dance with.
Dress either in bright colors, or just plain white, and wear your hair in a bun, with shiny jewelry to match.
Men prefer to ask girls to dance who look comfortable and don't feel pressured. Even if you don't dance well after a song, keeping your smile and demeanor will help you get a chance to dance to the next song.