I say go with a few of the older tracks. Honestly cant go wrong with Michael Jackson, Macarena, Nutbush, Love Shack etc, no matter how old/young the kids are I bet they are still up dancing. Think back to your school days, everyone use to run to the dance floor when all the old classics came out, even the stupid ones like "The Ketchup Song". I say also throw in things like; Mambo No. 5 Any Vengaboys tracks Aqua tracks