Lunch Wagon (1981)

aka: Lunch Wagon Girls

Three women (Pamela Bryant, Rosanne Katon and Candy Moore) start a lunch wagon business but run into stiff resistance from their competitor Mr. Schmeckler (Rick Podell): Their presence is interfering with some sort of illegal activity he's involved in. While Schmeckler busies himself trying to sabotage their wagon, the women are busy falling in love with construction guys and rock musicians. Two bumbling diamond thieves create complications for both sides. Also with Dick Van Patten (uncredited).