Underscore Theatre's live production of "The Rocky Horror Picture Show" has sold out for the past  two years and promises music, camp and plenty of drama during a Halloween weekend of performances scheduled for 9 p.m. Thursday-Saturday and 6 p.m. Sunday. Chopin Theatre is at 1543 W. Division St. in Wicker Park. Visit www.chicagorocky.com to buy tickets, which cost $20.