My senior year in high school was the first year of the new 18 year old drinking age for MI
Needless to say, that was the end of school cafeteria food for me.
When the buzzer rang, it was a mad dash to the local Bar & Grill. Order a burger and two beers and have at it. Then back to class for a nap.
Three years later, they raised the age back up to 21....which I had just turned.