Don’t let your coffee table be boring: PowerHouse Arena, the arty DUMBO publishing house, is having its annual summer overstock sale on titles by and about Bettina Rheims, John Coplans, Ricky Powell, Jeff Mermelstein, Larry Fink, André Leon Talley, Nigel Parry, Barack Obama, Brooklyn Bikers, Madonna and more. Books are going for as little as $3 (as much as $25, but plenty in between, which means 50-90 percent off cover prices). The Arena itself is worth the trip—a loft-like venue for performances, exhibitions, and other brainy gatherings. Sale runs through August 30. PowerHouse Arena, 37 Main St., DUMBO, Weekdays 10-7, weekends 11-7, (718) 666-3049.