Javelin + Delicate Steve + Helado Negro

Brooklyn duo Javelin performs what seem like lost dance anthems from an unkempt disco—a little poppy, a little arty and irredeemably goofy. Although at a glance, its songs scan like ’80s novelties, the band is a thoroughly modern construct, melding samples with original material while flirting with an iPod’s worth of genres. Tonight the combo hits LPR with a suitably buzzy supporting slate.