Singer-songwriter and multi-instrumentalist Rostam Batmanglij first burst onto the music scene as the guitarist-keyboardist for Vampire Weekend—he also produced the band’s first two albums. Batmanglji amicably left the group early last year to launch a solo career as Rostam. I Had a Dream That You Were Mine (stream it below), a collaborative effort with former Walkmen frontman Hamilton Leithauser, arrived last September. “Leithauser and Rostam take their flair for reimagining classic sounds with postmodern glee to new levels,” said AllMusic. And with a full-length solo album due later this year, Rostam (above, the video for his brand-new single, “Gwan”) plays The Bowery Ballroom on Wednesday. Former Dirty Projectors bassist, keyboardist and vocalist Deradoorian opens the show.