I try not to set foot in places like Art Caffe,..always find staff in foreign owned establishments a bit frosty, even if when it is not necessarily discrimination. The other reason is a faux pas sometime back when I strayed into an international hotel ...so much hair splitting ..in this case, the waiter would not clear the empty plate (I had cleaned every morsel off its surface),because you need to arrange the fork and knife touching the plate turned down or something like that. He let that awkward situation stew for a long while and I had to prompt the guy to take it away. I got a tutorial on how to arrange forks and knives in the most condescending sing-songy tone you can ever imagine.
As if that was not enough, as I am about to leave, egg on face, the person I was meeting hints I should stop being a culture-less village person and suggests it is fashionable to leave a tip in such places. I like fashion as much as the next person and being neither too mean nor too extravagant, I imagine 200 is plenty of tip ....alas the tip gets rejected sneeringly but in perfectly polite language. Apparently there is a rule written in an obscure scroll somewhere that says you have to tip 5% of your expenditure.
Fine, I admit I was ignorant, but humiliation traumatises me - I go to great lengths to avoid it. Some education I can do without, like obscure rules of dining.