They listen to the same thing the HS kids listen to. I use the School Dance Network, it is worth the $50.00 a year, for what they do. There are still some songs that require edits on the School Dance Network, but they show those issues. I have 3 schools signed up with them now and it worked great last year.
I have noticed after about 1.5 hours the middle school boys turn into animals and like to stick thier heads up against the subs and run around. The girls merge to thier little cluster and continue to dance as a group. The boys dance with thier dates early on, but as I mentioned above, loose focus quickly.
Ray J.