My main high school and summers-of-college job was at a grocery store, but during my junior and senior years at University of Iowa, I worked at the Taco John's in downtown Iowa City.
Lots of interesting characters as co-workers, and some fun times working the closing shift with basically no manager around. One of us closers had to clean bathrooms, the other had to deal with the huge pile of dishes. I always preferred the dishes.
Highlights included trading food with the nearby Chinese restaurant, getting people to leave at closing time by offering them free Potato Oles (that we were going to throw out anyway), and serving Bucky Badger on a Saturday evening after a Wisconsin-Iowa football game.
I still could go for a couple Taco Bravos and a Potato Ole ...