Hair is a very easy ticket to get for lotto/rush, it seems, and I would totally see it on Broadway if I weren't already seeing it for a second time on tour this year. If you look towards the bottom of the board, I bumped a thread recently about the Sister Act rush if you need more info. And I rushed How to Succeed...successfully, but I had to wait a few hours to do so. If you get there early in the morning, you'll be fine. Especially for a two show day. No one knows about how the Follies rush is yet, obviously, but the show is great and definitely worth your time.
"Art, in itself, is an attempt to bring order out of chaos."-Stephen Sondheim