Car Wash is a 1976 American comedy film released by Universal Pictures. The Art Linson Production was directed by Michael Schultz from a screenplay by Joel Schumacher. Starring Franklyn Ajaye, Bill Duke, George Carlin, Irwin Corey, Ivan Dixon, Antonio Fargas, Jack Kehoe, Clarence Muse, Lorraine Gary, The Pointer Sisters and Richard Pryor, Car Wash is an episodic comedy about a day in the lives of the employees and the owner, Mr. B Sully Boyar, of a Los Angeles, California car wash filmed at a Westlake car wash at the corner of Rampart Blvd. and 6th Street.
Mr Bs son Irwin Richard Brestoff, a leftwing college student who smokes pot in the mens restroom and carries around a copy of Quotations from Chairman Mao, insists on spending a day with the working class employees, since he considers them brothers in the struggle. As he gets ready to go to work, he sets off motion sensors that give him the first human car wash, which he takes in a goodnatured if potinduced stride.George Carlin appears as a taxi driver searching fruitlessly for a prostitute who stiffed him for a fare. The prostitute, Marleen, has her own hopes shattered as a customer who she apparently has fallen in love with has given her a false telephone number. ........
Source: Wikipedia