Re: On tipping for coffee

I should have included quotation marks, I guess, but I thought the Q and
A made it clear that I got this from elsewhere. (Mercury News.)
I.e., I wasn't the one asking the question. (I don't drink coffee,
anyway.)
But I admit, I USED to get confused even before the automatic screens
existed. That was because it was rare for me to go to some place and buy
takeout food to begin with, so I wasn't quite aware that one doesn't
have to tip a restaurant when there's no waiter or driver. Even though
there was a SPACE on the paper bill, for a tip.
(Nowadays, people have to be reminded that just because the screen is
there, it doesn't mean that a tip is appropriate.)