Homecoming?

My school's homecoming is tomorrow and, as a high school freshman, I am now allowed to attend! I'm not entirely certain what said celebration entails, but I do know that it goes on for four hours, which is an insanely long time. Since my school is small and there's not much romantic couplage going on, I don't think there's going to be a lot of such things happening. I suppose it's a school spirit event, but to be honest I don't know what to expect from four hours at school on a Saturday.