I worked at Dunkin' Donuts in highschool, don't remember the actual dates, but it was over a year on and off. I guess it's different from McDonald's because the customers were mostly nice and we got tips that added like $2/hr. What made me quit was one day one dude called in sick and the manager was on the phone with his sister all day, so I had to do everything by myself. I finished the day and quit. And I wrote a guide on how to short-change the cash register, it comes up 3rd on Google for "working at dunkin donuts" which is sweet

(it was 1st for like 2 years before the whole
SEO concept got invented)
Working at Dunkin' Donuts@Everything2.com it didn't actually make me much more money (also, I'd have to put the theft proceeds in the tip jar, which meant I only got 1/3-1/5 of the loot), but it added a little excitement and made the hours go by faster.
Also worked a second job in HS as a cashier at Shop Rite (grocery store chain on the east coast). I made a small Klein Bottle out of "Paid" stickers they had. I quit after I made $400 in a $5 poker tournament, which represented 4 weeks of shoprite pay, so I figured I could do better at that.