Pizza buffets are not uncommon. Quantity, not quality, is usually the name of the game. But Goat Hill Pizza in San Francisco's Portrero Hill neighborhood manages to offer truly tasty all-you-can-eat pizza on Monday nights. The key to their success is avoiding heat lamps. Instead of slinging pizzas onto a buffet, waiters bring the pizzas around the restaurant, offering slivers of the latest pie out of the kitchen.