Lower East Side: Gerber Group debuted a new rooftop bar and restaurant called Mr. Purple this week at Hotel Indigo. It will be serving some treats from local spots like 2nd Avenue Deli, Russ and Daughters, and Il Laboratorio del Gelato, and there's 6,000-square-feet of outdoor space with a pool. Status: Certified Open; 180 Orchard St., 212-237-1790 2.)