Food service needs a lot of people to work the 2 hour lunch shift from 11-1 and then go home. You get out of the house, get to talk to real people. Doctors have noticed that people who sit around doing nothing tend to die earlier than those who stay busy, and people who talk to others also do better, so that 2 hour shift could add years to your lifespan. That you get some extra spending cash is a nice bonus, but not why you do it. (at 16 you do it because they are about all that will hire you and you need then money)