072308hair.jpgIf you happen to be reading this in East Harlem, you’ve got a good shot at getting quick tickets to the Shakespeare in the Park revival of that ‘60s rock musical HAIR – you know, the one with that song "Age of Aquarius" from The 40 Year Old Virgin. The Public Theater is giving away vouchers for free tickets in all five boroughs through Saturday – today they’re at the El Museo Del Barrio (1230 5th Ave @ 104th Street) until 3 p.m. Sure, tickets are free anyway, but there's (theoretically) not such a crazy line for these. Just check the website for all the uptight, 21st century details about what “voucher” means to those squares at the Public.