Back in the fall at the one (Thai) restaurant where I work now, like three (South Asian from South Asia) (like very late undergrad- or very early graduate student-age) students came in, two men and one women.
And, they were odd.
Like, I was up by the table and they just seemed off, and I asked my standard question about any appetizer orders being put in right away -- something that is very rarely taken up by any (South Asian) customer, in fact they tend to dislike the question (because it rushes them, or because it takes control out of their hands?) -- and as I go to step away, the woman starts saying something quietly while still staring at the menu, and it seems like she's talking to her friends, but as I step away, all of their heads turn to look at me, and so I step back and apologize and ask if she had said something and wanted to order, and yes, she wanted some vegetarian egg rolls.
(Oops.)
Anyhow, when they go to order, the one guy wants basil rice with egg only -- something not on the menu -- and so I have to bring his attention to the roughly equivalent menu item, and again he wants egg only (? - there's basil in there, and also an array of vegetables, and plus you have an option of tofu or a larger mixed vegetable mix, so are you just asking for like rice and basil, or what?) -- and so finally I have to point him to the menu and lead him through the listed ingredients, and then his (female) friend explains that you order either tofu or the vegetable mix, and so after those interventions he places something like a recognizable order.
Then, the next guy goes, and he says something that I just can't understand, because he says something about a curry and rice, but neither is a name that is in the menu or is easily recognizable as a name that's in the menu, and it's not clear if he's actually ordering a curry, or the rice that has curry in it, or what, and when I ask him, he just keep repeating the same impenetrable phrase over and over, and it's not even clear if he's looked at the menu or is referring to anything in it. So, it takes some time to straighten that out, and it turns out that he wants to order *both* a full curry and a full fried rice, and so I gather all of their orders, and just as I've finished entering them and am about to push the one final button to send the entire order back to the kitchen, he shows up at my side by the front terminal to cancel one of his orders that he just made two minutes ago, now he just wants the curry, no fried rice, and I ask him if he's changing anything else, he says no, that's the only change, and I say that I should check with the table, and he says no, it's the only change, but I firmly say no, everyone said that the order was final two minutes ago and now there's a change, so I would like to re-confirm with everyone, and so I go back to the table, re-confirm their order with them, and then I ask if it's truly final, and I give my spiel about mistakes can happen, but to change the order after it's placed tableside can cause cascades of errors and mess up their food, etc., and they do *not* seem too happy about that, that I've questioned their behavior and the changes they're making with their order.
Also, at the end of the meal, they say it's separate checks, and I ask if it's individual checks or if there's an internal group of someone with another, and they're like no, it's individual, and so I print out their checks and bring them to them, and suddenly, someone wants to pay for someone else.
Also, they're weirdly specific about what kind of boxes they want for their takeout, above what's normal, and all the while it's like I'm on tenterhooks, and they're just glaring at me, although **they're** the ones with the abnormal behavior.
. . .
(One of them also had a to-go order for takeaway after the meal, and it was $60 worth of food across 3 people, with. all things totaled, a $3 tip. It's always a bad sign when customers are hyper-demanding or don't look at the menu before ordering or try to change their orders, that so strongly correlates with boorish behavior and ultimately a bad tip.)