When I was in K-6, the gym teacher was huge on dancing. We spent at least half our gym classes each year doing some sort of dancing. She must have been a good gym teacher - she won a bunch of teaching awards I remember.
It was sort of a joke once we started gym in junior high. Then, our freshman year (only time we had to take gym), they sprung the dance lessons on us. It was crazy bizzare - the lesbian that was the girls gym teacher and the HUGE HS football coach teaching us how to dance.
We did the Waltz, some square dancing, and most of the "wedding reception dances" (electic slide, et al).
I think it was state mandated or something - because there is no way in hell the guys gym teacher would have agreed to something like that on his own. The best way I can describe him is Paul Sr. from American Chopper, only fatter and lazier.