We had a hot lunch program when I started to Jr. High and High school. This was early 50's, and a substantial amount of our lunches were concocted from surplus WWII canned beef...we called it mystery meat. We would eat that stuff, and about 2:00 all the classrooms would be empty and the restrooms were full. We finally caught on and wouldn't eat it any more, so we got wieners and beans. At least it was reasonable; we paid 20 cents per day for our lunches, and a lot of the time my folks didn't have the money to pay for my brother and me...but they always got caught up somehow.