Spend a few minutes inside Mozzeria, a popular San Francisco pizza restaurant, and you might notice that something seems different from all other restaurants. It's not that Mozzeria is particularly quiet, with the din of customer chatter hovering in the background. But the servers aren't speaking out loud. Neither, in fact, are most of the employees. Mozzeria is a deaf owned and operated restaurant—among the first in the U.S. (if not the only one).