The Walkmen have lost a little bit of pep over the years. Back in 2002 the New York quintet was full of vigor: Vocalist Hamilton Leithauser rocked like Vassar’s answer to Bono, howling messages of hope into the homes of upper-middle-class indie-rockers through satellite radio broadcasts and episodes of The O.C. But on its latest album, You & Me, the Walkmen seem mired in a midlife crisis. Leithauser and his bandmates curl up at the bottom of the reverb tank—getting nostalgic, feeling puzzled by domesticity, and slowing down the tempos. But this mopey vibe becomes them: As with Tony Soprano or Mad Men’s Don Draper, their slide into the depths of manly discontent just makes them all the more captivating. THE WALKMEN PERFORM WITH GOLEM AT 6:30 P.M AT THE 9:30 CLUB, 815 V ST. NW. $15. (202) 265-0930.