That could work. Though with a normal highschool in a town this size holding three hundred or so students at a time, I imagine using an abandoned factory of some kind, a few miles away from the rest of town. It could still be bought by one of the rich parents, and would be large enough for a hundred or so people. Renovate it to be semi-clubbish. Nothing fancy, but a nice speaker system for a DJ, a bar, pool tables, few gambling tables... You get the gist. A shack just doesn't sound big enough, ya know ya know?