(I’m in a fast food place for lunch. Their restroom is locked and requires an employee to buzz you in from behind the counter. After using the restroom I exit and notice a stereotypical-looking “Bro” on the other side of the dining room taking up two tables to fold laundry.)

Customer: Yo, man! Hold that bathroom!

(By the time he yelled to me I am already about five feet away from the door and turn around barely in time to watch it lock back shut.)

Me: Sorry, if you ask the cashier they will buzz you in.

(I get my food and sit down to eat not too far away from the counter. A few minutes later I watch the guy go up and ask them to let him into the bathroom then stare me down smirking when they buzz him in. I think no more of it until another few minutes pass and he storms up to my table and slams his hands down on it, drawing the attention of other customers nearby.)

Customer: DOG!

Me: What?

Customer: DOG!?!?!

Me: …dog? What?

Customer: You think you’re so much better than me, dog?!? Can’t hold a door, bro?!? You see me having clothes with me and my situation doesn’t deserve your help?!?!

(At this point the guy is yelling so much he begins just spouting unintelligible nonsense. I just sit there completely baffled by the entire situation. Suddenly he notices that someone at a nearby table has begun dialing a phone and he grabs his bag and storms out the door. Employees also come out from behind the counter to see what was going on.)

Customer #2: What the hell was that? That guy looked like he was gunna take a swing at you. I’m about to call the cops.

(I recount what happened to the other customer and while one of the employees goes outside to make sure the guy actually left. I tell the other customer not to bother calling the police since he never actually touched me and I’m not sure what they would even do about it at this point.)

(For once, I was the bad customer in this story, but I feel I made it right in the end! I received a gift card for a restaurant that’s not part of a chain and they only have the one restaurant. Having used gift cards at other restaurants, I assumed I can leave the tip on the gift card.)

Me: Just to make sure, can I leave a tip on the gift card?

Server: I’m not sure. Let me check!

(The server goes to check and returns in a few minutes.)

Server: Yes, but we have to enter the amount of the tip.

Me: Okay. *Quickly figures out a tip* Put $4.00 for the tip.

Server: Okay! I’ll be right back!

(Looking over at the server, it appears she’s having some issues getting the gift card to run. She later comes back to our table.)

Server: We can’t actually put the tip on the gift card, I’m sorry.

Me: Oh no! I don’t have any cash on me and all I have is my debit card.

Server: That’s okay, don’t worry about it! I understand completely. The same thing happened to me once before.

Me: No, that won’t do. I’m not that kind of person.

(We left the restaurant and went to an ATM machine. The bill was $20, and the ATM only dispensed bills in multiples of $10. I did that. We then returned to the restaurant where I started looking for our server.)

Me: Here, I wanted to give this to you!

Server: No, that really isn’t necessary.

Me: Yes it is! I’m not that kind of person to just walk out without leaving a tip.

Server: Wow! Thank you so much! You didn’t have to do that!

Me: Yeah, I did. I was a server a while ago, so I understand how much we rely on those tips.

Server: Please come back again!

(As I was walking out, I could hear the server telling her co-workers about the 50% tip I left her!)

I work in a bookstore and we’ve had a LOT of people put their names down for a certain Trump-related book in the news. We just got in a few copies which are obviously on hold behind the cash desk.
Customer: “Do you have any of that book everybody wants?”
Me: “Which one?”
Customer: “You know, that big one.”
Me: “Fire and Fury?”
Customer: “Yeah, that one.”
I explain that we only have ones that have been spoken for.
Me: “We’ll have more stock on Monday.”
Customer: “Well, can’t you just give me one (meaning right now)?”
Me: “I can give you one on Monday.”

I am working front counter at an iconic Canadian coffee store. A man comes up to the counter, orders, and dumps a handful of change.
After I count the change out I realize he’s $0.20 short.
Me: I’m sorry sir, there’s only $2.05 here, you’re $0.20 short.
He looks at me as if I am dumber than dirt. He scoops all the change back and says in an extremely condescending voice
Man: These are QUARTERS and these are DIMES so there is $2.25 here.
Me: Actually sir, this is a NICKEL, not a QUARTER, so you’re still $0.20 short.
He turns bright red and throw another quarter on the counter before basically running away.

Customer comes to my register and decides there is a defect in the article he wants to buy and wants to know what I will do about it.
even though I didn’t think there really was any reason to give him any thing off I decided to give him 10% off. He immediately demands to speak to the manager, so I call her to the register. She takes a look and tells him that is the way the item is suppose to look and walks away. He then tells me he wants it for the price I quoted first. Told him ,Sorry sir but she is the manager and I can’t override her. May have been a tad gleeful to myself