The last face-to-face service job I did was when I was 19 working as a security guard in a large, corporate piece of real estate.
People rarely talked to me except one day when everyone got handed proxy cards at the same time as part of the new system for accessing certain offices. Some people were confused about where they could get a hole punched in them and they thought we could do it for some reason, so I got approached by about a hundred office workers that day with the same request that I had to turn down every single time because I didn't have the equipment or authority to deal with it. A lot of them were cold about it, like they just walked up to the desk and held up the card without saying a word while holding up their card then let out a big, exaggerated sigh, rolled their eyes and stomped away when I politely said that we didn't have the equipment to punch holes in the cards. Most were 40-60 year old, heavy set, office worker types.
After this had happened a few dozen times I called my boss to confirm I wasn't supposed to be doing this and indeed I wasn't but neither of us knew who was supposed to be.
Towards the end of the day, a 40-something year old middle manager type approaches my desk with the same request as everyone else. I said the exact same line I had been saying and he responded by throwing his wallet at me as hard as he could and demanding that I punch a hole in his card and give him the lanyard for it. When I told him I couldn't do any of that and placed his wallet back on the desk in front of him, he asked me if I'd like him to bring in his 12 year old son who could apparently do a better job than I could. Then he went on a huge rant about how I failed at life and how this was the best job I would ever get (I was a 19 year old university student at the time whereas he let it slip in his rant that he was a high school dropout) and so on.
After having enough of his shit I curtly said "are we done?" which prompted him to try and leap over the desk and take a swing at me. I leapt back and he didn't have the nerve to follow through so he spat on my uniform instead, turned around and gave me the finger when he was walking away. Meanwhile people in the lobby clapped and I heard someone say "he wouldn't do it for you too, huh?"
Later I called my company (I was being contracted/dispatched) and sorted everything out. They were supposed to get that done in HR and had even received an email about it a week prior, so I clarified this by writing what they had to do as clearly as possible on a big sign. No one apologized and the middle manager I had a spat with came in the next day and greeted people in the lobby where I was stationed and said "looks like that retard is still stationed here."
Then I got a call from my company to take the sign down as someone complained about it (it literally just said "please get your proximity cards punched in the HR Dept, have a nice day" or something to that effect). Then I had to deal with a few dozen more people waddling up to my desk and acting all crotchety when I said I couldn't punch a hole in their fucking card.
Anyway, the bullshit you have to put up with for minimum wage working in any part of the service industry is ridiculous. Never again.