Summary

Kids don't eat IN the cafeteria because it's hot, noisy, cramped, steamy, and they want to eat with their group of friends.
In the lunchroom the tables can only hold so much and with all the other factors, they want to eat outside or in the halls.
Yes some do eat in the lunchroom, but they are the ones who complain about the cafeteria and the food.
The ones who eat in the halls or outside, they just have the food to complain about.

The janitorial squad hate the booths, they hate sweeping and cleaning them.
They don't move, since they are stuck to the floor, the little push brooms can't get under them well enough so it makes their job harder.