It could be that the noise level is deliberate, a reflection of the urban name, or accidental, a result of the former Astor Place's mod-Italian renovation. But while there may be quibbling about the motive, there's no question over the decibel level -- it's about as high as the two-story ceiling allows. That said -- or shouted -- Metro possesses a great buzz. Like that created by a horde of honeybees feeding on the pollen of flowers that have been grown on a nuclear-waste dumping ground. But a buzz, nevertheless. And on South Beach, louder is always better.