From the Bozeman Daily Chronicle: Dance debate divided on grinding. Basically, the kids at Bozeman High dance a bit more "expressively" than their parents ever did.
Several years ago, I chaperoned a group of college students to an out-of-state conference. If the dancing at Bozeman High is like that which I observed on that trip, I can see why parents would be a bit concerned. It certainly would not have been acceptable at the Methodist-sponsored dances I remember ;-)