‘The Book of Mormon’: The “South Park” guys have a B’way hit on their hands. We give it 4 stars.
Gotham Girls Roller Derby opening night: These vixens on skates start their 2011 season on Saturday. (8:30 p.m., City College of New York, ggrdtix.com)
R. Crumb: The Society of Illustrators hosts this retrospective of work by the alt-comics pioneer. (Through April 30, societyillustrators.org)
‘We Love the ?Golden Girls’: This drag celebration of everyone’s favorite old ladies features trivia, costume contests and more. (Sat., 8 p.m.-4 a.m., Stonewall Inn, 53 Christopher St.)
‘Gagathon’: Celebrate Lady Gaga’s birthday with the tribute band Rad Bromance. (Sunday, 7:30 p.m., B.B. King Blues Club, bbkingblues.com)