All-American Food Restaurant, one of the few remaining carhops in the state. The aluminum window trays used by carhops are still manufactured and sold today. They opened a restaurant called the Pig Stand, which had male carhops from its inception. Harrison Street installing a "call-in" system rather than the carhops. The film focuses on two carhops as they compete in a mystery record contest. In 1931, a California Pig Stand franchise introduced a drive-through service that bypassed the carhops. He opened up more locations, many of them with carhops. In 1921, Kirby's Pig Stand introduced the drive-in restaurant, in which carhops delivered meals. The carhops were eliminated, making the new restaurant a self-service operation. Carhops have long been associated with hot rods. Tips can only be paid in cash, though carhops make less than minimum wage. Rothman originally wrote the script, then entitled "Carhops", while she was at Dimension Pictures. Sometimes called drive-ins, these junior stores did not use carhops. Sonic Drive-In still employs carhops at most of their over 3,600 restaurants.