Follow the rainbow and youll discover that at the end lies Cyndi Laupers True Colors Tour. Were talking five hours worth of gayness, thanks to a lineup that includes Rosie ODonnell, Nona Hendryx, Joan Armatrading, and the B-52s. (The rock lobster-ers are back! And with a new album, Funplex.) This flamboyant shindig supports a good cause: $1 of each ticket sold goes directly to the Human Rights Campaign and helps further LGBT awareness. So down a couple vodka-&-Red Bulls, bop the night away, and call in sick tomorrow morning. (At least there wont be any morning exams.) WaMu Theater, 1000 Occidental Ave. S., 381-7555, www.wamutheater.com. $55$125. 6:30 p.m.