The night before Thanksgiving it was snowing, and Katy Hawkins and Cyane Gresham were shoveling the walks at the meetinghouse. Katy strung twinkle lights around the Social Room floor, turned on the heat, and had 30 yoga mats ready. At 6:15pm there were only four pairs of boots on the floor of the front hall and she thought another six boot-wearing friends of yoga might come.