San Francisco’s newest Mission pizzeria is not what one might expect. Despite being on a bustling stretch of hip restaurants on 16th and Guerrero, Mozzeria is noticeably quiet and bright for dinnertime. The reason why? Mozzeria’s owners, Melody and Russell Stein, are deaf, and American Sign Language, along with a whole lot of nodding, pointing, smiling, and writing on notepads, take the place of the usual restaurant staff chatter and background noise.