Three recent sets of (South Asian) customers...

...at the one (Thai) restaurant where I work now:

1) Four (South Asian-American) (STEM bro) (undergraduate) guys who call each other "man" a lot come in a little on the late side for a late-night dinner, and, among other subjects, they discuss research areas in aeronautical engineering.

"Turbulence is sick," one observes very heartily, to the others.

(All tip normally, except for one who leaves only a dollar for his meal -- bad influence from his [presumably immigrant] parents that he has not yet outgrown, I would think.)

2) A table of four (college-age) students includes two (young) (princess-y) (South Asian from South Asia) women, and one bespectacled (Indonesian?) (Muslim) woman in a headscarf, and a (young) (curly blonde-haired) (white) woman, and they all split a meal together, ordering like three entrees for the four of them. When it is time to offer boxes for leftovers, too, there is only the smallest bit of rice left, and only the smallest bit of curry, and one of the (young) (princess-y) (South Asian from South Asia) women wants separate boxes for each of those two things, and then, after the boxes are brought out, she requests a fresh spoon for the rice, since there is only one spoon left on the table, in the curry bowl, and presumably she does not want to touch the rice with that spoon that has a little bit of curry sauce on it, when she packs it up to-go.

(I tell this to my one [newer] [taller] [Thai] coworker, and she just rolls her eyes. The tip is exactly 15%, to the penny -- a surprise, considering that one of the [princess-y] women paid.)

3) A(n early 50s) (South Asian from South Asia) man with big crazy eyes and stocks of hair slicked haphazardly across his half-bald pate is in with a (fatter) (bald) (more placid) (later 60s) (South Asian from South Asia) man, and, from the moment he sits down, he keeps saying that he can eat no meat, and finally when I ask to clarify, he says that eggs and fish and shrimp are okay.

And, he is always waving me over, and like I always do when anyone requests something, before I leave the table, I'm like, "And is there anything else that you need right now besides that?", and the first time I do that, as I walk away from the table, he says quite loudly to his dining companion, "See, he's a professional."

Towards the end of the meal, too, he takes a phone call, there, and his voice thunders through the mostly-empty restaurant. 

Also, when it is time to leave and they request to-go boxes, I bring them over to the table, and he is like, "And now you can pack that up," and I have to say something politely about how that's something that we leave for the customers themselves to do.

(The tip is like $5 on a forty-some dollar bill -- not bad, considering that a bit of chicken had shown up in his tom kha soup with shrimp, and he needed a replacement cup for himself.)