Three Tomatoes was closed for renovations all last week. What's cooking at the Church Street trattoria? Updates include a private dining room, a full bar and, of course, a new look. See for yourself when it re-opens on Friday . . . Signs of winter? Steaming hot chocolate suddenly sounds pretty good. On Saturday, Lake Champlain Chocolates will be giving away samples of their Traditional, Aztec, Old World and New World varieties . . . The Bangkok Bistro Thai Steakhouse on Shelburne Road has gone the way of Rosita's, La Caretta and El Mariachi. (Figure in Burlington's shuttered Miguel's and Coyote, and you have to wonder: Is it a Mexican thing?) The Thai Steakhouse was locked down and dark last Saturday night. A paper sign covering the wooden one announced a Thai successor, Lemon Grass, "coming soon."