(My coworker is taking drive-thru orders, and I’m filling them.)

Coworker: “Thank you for choosing [cafe]. How can I help you today?”

Customer: “I’d like a large iced mocha latte, please.”

Coworker: “Your total is [total]. Please pull forward.”

(The customer is given the drink, but sends it back through the window.)

Customer: “This isn’t what I wanted. I wanted the hot mocha latte.”

Coworker: “Well, you did say the iced mocha latte. We’ll fix it for you though.”

Customer: “Oh. So when you say iced, it doesn’t mean the hot one?”

Related:
You’re Hot And Your Cold You’re Yes And You’re No

Customer: “Can I borrow a pen?”

Coworker: “Yeah, sure.”

(My coworker hands the customer a pen, and she goes back to her table. However, she returns a few minutes later.)

Customer: “YOU’VE PUT A BEWITCHMENT ON THIS PEN!”

(She throws it hard at my co worker. Turns out she hadn’t taken the lid off. Half an hour later, she approaches another coworker.)

Customer: “Why should I have to queue? I have already done so once!”

Coworker #2: “Because that’s what you have to do in civilised society.”

(The customer queues and buys a piece of cake, then walks into the stock area out back, with PRIVATE written on the door, to find my co worker.)

Customer: “I’m sorry for shouting. Please take this cake.”

Coworker #2: “Sorry, I can’t. We aren’t allowed to eat on duty.”

Customer: “SHUT UP AND EAT THE BLOODY CAKE! I WON’T LEAVE UNTIL YOU DO!”

(While this is going on someone calls the shopping center security. They come remove her from the entire shopping center. Later on that day, she comes back for one last salvo.)

Customer: “I HOPE YOU’RE HAPPY! DO YOU KNOW WHAT YOU’VE DONE TO ME?!”

(I’m standing in line at a coffee shop when I overhear this exchange between the barista and a creepy older customer who is obviously hitting on her.)

Barista: “What can I get you, sir?”

Creepy Customer: “…And why aren’t you on the menu, my dear? You look good.”

Barista: “Because, sir, that would be cannibalism. What type of coffee can I get you?”

(Dejected, the creepy customer orders a coffee and slinks out of line. Afterwards…)

Me: “That happen often?”

Barista: *smiles* “It’s his third attempt.”

Customer: “Hi, I would like a small latte, please.”

Me: “Would you like a flavor shot added to your latte?”

Customer: “Do you have any sugar-free flavors?”

Me: “Yes.” *points to the menu* “Our flavor shots are listed here, we have sugar-free vanilla, caramel, hazelnut, raspberry.”

Customer: “Hmm, no thanks. I really shouldn’t have any sugar added to my drink. Can you just put honey in it?”

(I am working alone in a very crowded kiosk. A customer points at a soda refrigerator.)

Customer: “Can you tell me which ones do and don’t have gas in them?”

Me: “Gas?”

Customer: “Yes, gas! I want one without gas!

Me: “Oh, okay I think you mean carbona—”

Customer: “I mean gas! I don’t like it.”

Me: “Well I’m sorry to tell you this, but everything else except for regular spring water has ‘gas’ in them.”

(The customer keeps staring at the refrigerator quietly, then picks up one soda.)

Customer: “Does this one have gas in it?”

Me: “Yes.”

Customer: “How about this one?”

Me: “Yes.”

Customer: “Hmmm. How about this one?”

Me: “Yes. As I said, only spring water doesn’t contain any gas. All the others do.”

Customer: “Well, I think I’ll take this one anyway and try out for myself.”

Me: “Okay, great, that’ll do two euros.”

(After about 10 minutes, the customer comes back.)

Customer: “MISS! IT DOES HAVE GAS IN IT!”