ART: At the group exhibition Black Lab, a diverse line-up of artists investigates the cultural connotations and psychological implications of the darkest color. There will be performances by Terrance Graven, Gerritt Wittmer & Paul Knowles, and Group Rhoda.

7 to 10 p.m. // The Lab (2948 16th St) //

THEATER: It's opening night of the A.C.T. Junior Young Company's production of I Was a Rat!, a "whirlwind theatrical adventure" based on the best-selling children's book of the same name, which "playfully satirizes the power of the press and the subversive swing of public opinion."

7:30 p.m. // Hastings Studio Theater (77 Geary St, 6th fl) // $20

COMEDY: Bobcat Goldthwait, whose latest movie, World's Greatest Dad, starring Robin Williams, received rave reviews, will be at Cobb's tonight and tomorrow night. Luckily that squeaky whiny voice is a thing of the past.

8 and 10:15 p.m. // Cobb's Comedy Club (915 Columbus Ave) // $20.50