Earlier quoted context omitted.
That depends on whether it's table service, or whether you yourself go to the counter to buy your drink. Until very recently, that was the dividing line for tips (except at bars).
How cruel can one be to try to come up with such a "line"? In my mind it goes like this: If you're served by a human and tips are not included in normal pay by law, you tip. If it's a country where people can't live with just the one job, you tip a lot.
Tipping everybody who you hand cash to is crazy. And the US is the only place where you have to do it for a large percentage of that population.