It’s Friday morning in Hasidic Crown Heights, just two blocks away from the Chabad-Lubavitch World Headquarters, and we are doing cat-cows. In cat pose, I hunch my back and pull my chin to my chest, letting gravity pull my ponytail to the ground. In cow, I pull my shoulders back, look up, and scan the room. For some, this class at Vessel Studios is a final meditative moment before a hectic day of shopping, cooking, and otherwise preparing for Sh…