I sent you a copy of "The God Delusion" in December, and I'm not joking.
I actually lived out of the NIU library for a few days once. It's pretty easy, if you look like a student. You can pull three square meals a day from the food that wasteful college kids throw away, plus coffee and snacks, and there's a stairwell you can sleep in that nobody'll find you in. Just camp out a few levels under the basement floor where the cafe is; it's cold and the concrete isn't comfy, but nobody goes down there, not even the janitors, so you can get a good night's rest if you can stand the fluorescents. Plus, the security guards clear out pretty quick, so you get the run of the place about half an hour after closing!
If not for that library, I would have both freezed to death and failed to finish my finals. Didn't see much if the rest of the campus, though.
Lucky you, the commuter college I went to closed the library at about 10 PM and forced us to all leave. It sucks.