I'm curious as to the population of dancey Nerdfighters. It's sort-of a not very nerdfighterlike thing to do, but I'm sure there are some around somewhere! . I'm not so sure about cheerleading, though. It's almost the polar opposite of what you expect nerds to be into.
I take ballet and a jazz class. I also cheerlead. Quite frankly, those things are, like, my life. If I'm not on YouTube or reading, I'm dancing.