I'd never been to one of these before. And now I have. I was surprised to learn that it is not just for hamsters, but that basically any rodent that fits in the ball can race. As with many things, the kids were there to have fun, but the parents were there to compete. "Your hamster is stupid!" I heard an irritated mother bark at her three year old daughter, whose hamster ran the wrong way.
I thought that rats would have an edge, but the winner was a gerbil named Lucky. You go, Lucky -- stick it to the man!
I feel like I should engage in some kind of social commentary here, but I've got nothing.