Saturday Night Live (1975)

"The Olympia Cafe," January 28, 1978 John Belushi's Pete runs a Greek diner counter where every order turns into "cheeseburger, cheeseburger" and every soda request into "no Coke, Pepsi," with Dan Aykroyd and Bill Murray working the grill beside him. The joke grows purely by repetition until the customers give up, and it shows how much the first cast could get from one line delivered with total conviction. Host Robert Klein is among the bewildered patrons.