Had a job at JJs, a little over a decade ago, right after I turned 19. Honestly (especially as far as food service went) it was pretty great. The sandwiches are all super basic so, in terms of food prep there's not a lot to do other than slicing meat. I was a delivery driver at a busy location so, regardless, didn't have to do too many 'in-shop' duties; was an affluent area, as well, so it wasn't uncommon to make over $100 in tips on a 6-8 hour shift.
Really, never had a single issue until making a delivery to an apartment complex one day. Guy starts walking up to me getting money out so I started to hand him the sandwiches. He looked at me in confusion and was like "Man, I definitely didn't order any subs.", so I'm like "What's up then?", to which he replies "I'll give you $20.00 to suck your d*ck". I was a super innocent guy in my late teens, so I hurried back to my car. He was walking after me and wouldn't stop repeating "Man, I'm not giving you any more than $75, ite!? 75 take it or leave it."
Everyone that I have ever told that story to says that I missed an opportunity. The opportunity to get a gummer from a crackhead isn't the sort of opportunity that I've ever sought out in life.