18 eMacs, four 2009 24" iMacs, two iMac G4s, three MacBooks, two iBooks, a couple old graphite PowerMacs, an old Dell OptiPlex that doesn't work, and an even older OptiPlex that has Ubuntu. Very mac-oriented.
For school I have a 2007 MacBook Pro and an Alienware M11x R1 (which is being repaired again, this time the lighting system got messed up and the bezel is misaligned). That's pretty much it. Most of the students use their own computers except the younger kids. I think I'm one of the only people in the school with Snow Leopard. Or an Alienware.