Bagel place @ 14 years old. Couldn't stand it and quit a couple of months later. The boss gave me a hard time for quitting, so I cried and said it was because of my parents divorce. My parents divorced when I was 5.
After that I worked at the family business on all of my breaks (one hour photo/photo finishing place) doing counter work and the occasional photoshop. Did that from 15 years old 'til college (2 or so years).
I left that job because whenever we closed up, at 10 everyone that was under 18 had to punch out for legal reasons, but they would make us keep working?
That and the fact that it totally sucked.