There’s a local burger chain in the Seattle area called Dick’s, with about 6-7 locations, and they haven’t changed their menu in 50 years: four burger options, fries, shakes (3 flavors only), sodas, ice cream cones, and (I think) sundaes. No salads, wraps, fish burgers, chicken burgers, tacos, frozen yogurt, breakfast items, or smoothies. The place is almost always busy. A meal costs $4.50-7.50, depending on what you order.
We have a place here in Warren County, N.J. called Hot Dog Johny’s. They have had the same menu since they opened 60+ years ago. They serve boiled hot dogs with mustard and/or relish, soda, and buttermilk. There are days you can’t get into the place. And the hot dogs are terrible.
Sounds like In n Out Burgers. Double double, fries and chocolate shake