Forro in the Dark makes people dance like they forgot they could. They sweat, stomp, roll their eyes into the backs of their heads and don’t stop for hours. For the past four years, they’ve packed their home base and birthplace at New York’s Nublu Club well beyond capacity every Wednesday night, with lines stretching out onto Avenue C during hailstorms and blizzards. When a band makes you feel like this, you keep coming back.