There was one in Glendale, CA in 1952 that we used to stop at after the drag races when we were short of money, the burgers were 13 cents or a dollar dozen.
If we weren’t broke we went to Bobs down the street for a real hamburger!!!!
when I was a kid there was a place in my home town called zandys they sold burgers fifteen cents a piece or 10 for a dollar. the meat patties were small little things on a regular bun. most of us kids would buy a bag of them and turn the 10 burgers into 3 hamburgers 2 with a descent amount of meat and 1 that was short a meat patty that along with a 25 cent coke or a 50 cent shake malt. I am feeling old now