Buzzfeed has the 21 things every server hates. My favorite one is no 21. I have seen worse
I think the two worst examples I ever saw, was a dollar left on a $67 tab, on a credit card, and trust me, this is a good waitress who got it, and 31 cents, left, again on a credit card for a 54.69 tab, ans of course their kids left a mess from Hell. Some people should just not go out to eat, that is all there is to it.
Now, some things a bartender hates.
#1 The guy, who orders a shot and says “hook me up”. I have heard that one, or some variation of it about 850 times over the years. Number of times the guy actually tips, well, if anything? ZERO! So basically, this douche nozzle wants you to risk your job over pouring his drink, for a buck, if that much?
#2 The camper. This is the person who sits at your bar, eats, has a drink, or two, then sits, and sits, and… takes up a seat when you have people lined up waiting for seats.
#3 The patron who wants you to wait on them, and them only, although you have 15 other guests at your bar, and a service well to make drinks for. This is the person who needs something constantly. They are also the person who orders their burger, or salad, and THEN after they get it start the modifications to their order.
#4 Mr, or Ms Cell Phone. They sit at the bar, yacking on their phone. Do you let them be? Do you try to use sign language to ask them what you can get them? Then, after you get them a drink, and their order placed, everyone at the bar must listen to their obnoxious phone conversation for the next 30 minutes.
#5 And this is the most hated by far. It is the people you converse with, their drink is always refilled, or new drink made, they never wait for anything. They run up a good sized bill. They thank you, compliment you, but tip 10%.
Another quick one for you. Had a girl a few years ago, sat, drink, ate, all the time talking to a guy at the bar. Telling him about her job, as a server. Bitching about folks that tip 10%, over and over. Wanna guess what she tipped? Less than the dreaded 10%. How badly I wanted to ask her why. But, most people tip well, no complaints. And, yes, I have lots of bad service stories too, believe me.