Where can I find a disused high school gym?

I have an idea that I would like to pursue, but it involves the use of a gymnasium. Not for a few hours, but for a few days, at least. It will require major setup and an even more massive clean-up. It will also involve a large noctournal gathering. I would prefer it to be in Manhattan, Brooklyn, or Queens, but beggars can't be choosers. I would also like it to no longer function as an institution of learning. Hell, I'm no MoMA, but there's got to be someplace. I mean, there's a theatre company on Second Avenue that's in an old public school. I just need something like that. If anyone knows of anything, let me know.