I'll answer both of these inquiries here................
Because people are people are people. Some folks think that once people get to the work-place, or put on the job uniform, or punch a clock; that they leave WHO they are at the door. Their personalities, pet-peeves, likes or dislikes, dispositions, how they react, etc................
The "Perrier" thing was just something that ran through our industry in our little world. It just developed a life of it's own behind the bar. We all just decided, back then when the "yuppy" thing was a big deal, that people who ordered Perrier were snooty and uppity and putting on airs. The stuff is nothing more than glorified seltzer-water that, we decided, that people just MUST have in their had to be one of the "swells" at the time. So, in our little power-trip, we decided to not allow such a thing. Sounds stupid, but we were all just kids and we COULD, so we DID! Besides, it was a fun thing to do as well..............
With regard to the "closing early" thing..................first off, we weren't closing early. We always worked 'till closing time. But again, people being people, at THAT hour of the evening, we wanted to get out as soon as we could as ANY person would. So yeah, we'd cheat up a little on the clean-up and shutting down procedure. Hoping to get away with it. Sometimes we did, other times we didn't.
But again, I don't care if you're a cop, a school teach, a grocery clerk, a plumber, whatever..................everyone want's to leave work at the earliest time possible. Service industry workers are no different. Like I said, people are people are people. Just because a person works in a restaurant, don't think that they cease being a "people" like the rest of the world. There's nothing about a chef's hat or a waiters uniform that changes them from being a normal human being. Like everyone else, they want to work, do their shift, and get the hell out of there ASAP.