As part of the ongoing Frite Nite Trax single series, San Francisco-based electronic imprint Frite Nite just unleashed this collaboration between label boss/producer Salva and MC Vortex. “Pumpz” is a straight club jam to be sure, but not one without a handful of twists and pleasant surprises. What starts out as a basic, upbeat house-leaning tune quickly turns into a wobbly “post-juke,” dubstep-y bit of bubbling bass tones, choppy synth stabs, and disjointed rhythmic sounds. Salva’s production switches back and forth between the two club-friendly motifs while Vortex delivers snippets of verbiage about a “young female club-goer”—maintaining its deep vibes and slick swagger all the while.