Dances should usually have plenty of up beat music and a few soft songs for those slow dances. If the dance has a theme try to incorporate songs into the theme. Make sure to pick a good opening song that gets the mood going and stick to songs that most people will recognize.
Here's a good one by The Cars.
My favorite music to dance to is ska music !! I'm not sure it would be a hit at a high school dance , but it would be something new to your generation and it's so awesome ... And danceable, BAM !