It's why "Fame" remains a pop culture point of reference 28 years after it left theaters. It's why you stop and stare when a street performer starts doing head-spins on a concrete sidewalk. It's why ridiculous crazes like the Macarena catch on.
People love to dance. Or more accurately, people love to watch people who love to dance.
That may explain the recent boom of TV dancing competitions. Sure, ABC's "Dancing With the Stars" has been cha-cha-ing strong for six seasons, and Fox's "So You...Full Story