I covered a few night shifts when I worked at Meijer's (grocery store).
This was before they were open 24-7. So there were no customers...it was fun.
At that time (1987-88) I was making about $5.50/hr.
Nothing quite like a 50 pound bag of dog food, flying over the shelving onto the floor in your isle to keep you awake...lol
- TK