They say that the "cheeseburger" bit came from a place in Chicago, but there is a place in L.A. called Tommy's World Famous Chili cheeseburgers that only served Pepsi and chips. Nowadays they just changed to Coke, but you can now get fries at all their outlets. Best freakin' hamburger you can get. You can smell the chili under your fingernails a week later.
