A world in which a new Joy Division biopic is released every five years can be a confusing one. The label “post-punk” pervades the musical vernacular, but it’s been nearly drained of all meaning through extreme overuse. Yeasayer reattaches some meaning to the term, simply by being dark, catchy, and earnest. The Brooklyn act’s bleakly dystopian lyrics and dramatic melodies are the kind you’d expect to find on an unearthed 7-inch from any long-forgotten early-’80s 4AD band. But the group’s so far from aping anyone’s haircut, wardrobe, or shtick that its austere artiness doesn’t carry a hint of homage. To put it simply, Yeasayer sounds nothing like Joy Division; instead, it sounds like a band that could have shared the stage with Joy Division, which speaks infinitely more to the band’s icy innovation than any comparison would. Yeasayer performs with MGMT at 9 p.m. at the Black Cat, 1811 14th St. NW. $10. (202) 667-7960.