At Casa Don Diego Restaurant, it's not uncommon to overhear grandparents reminiscing about their favorite moments at the restaurant. Grandchildren lean in closer for a better listen to stories that, undoubtedly, find their way back to the food. Called an "old-school Mexican gathering spot" by the San Diego Reader, Casa Don Diego has been filling empty Chula Vista bellies since 1969. Today, the restaurant introduces new generations to its fresh chicken and beef fajitas, and arrachera steak served on a hot skillet with charro, or cowboy-style beans. When hints of spices begin to sneak up, of-age patrons can douse the flames by belly-flopping into 72-ounce margarita pitchers.