The newly opened Gem Theatre, 114. N. Wall St. in Calhoun, Ga., will throw a dance party at 7 p.m. Saturday. Setting the beat are The Rockingbirds, an Atlanta-based band that plays rock and pop from the 1960s and ’70s, and the Buckner Brothers Band, a Chatsworth, Ga., five-piece specializing in blues and Southern rock. Tickets are $15. For more information, visit www.calhoungem.org.