Dudley Laufman presents several dances that are appropriate for this situation:

…an evening of dancing for children where parents drop them off and you are left to baby sit. Kids running up and down the gym/hall….somebody finds a basketball, lots of screaming. What parents or adults are there, ignore you and their kids.spend their time gossiping, talking about who won the football game etc.

in a post on usenet: NEITHER CONTRA OR SQUARE