Nik Mercer's Let's Play House hoedown returns to Williamsburg for another night of top-tier 4/4 rhythms. This edition marks the NYC debut of Nicholas, who's put out a slew of great tracks on the No More Hits and 4 Lux labels. He'll be twisting knobs in a live set, with LPH resident Jacques Renault and Ghent, Belgium duo Down+Out joining in. There's also a supersecret guest "from Down Under" on hand as well. Hmm.…