Tipping Simplified

Via Daring Fireball,  GrubStreet gets it right.

Do I have to tip?
Yes.

It’s so complicated.
It’s not. When you eat and drink at a restaurant or bar or café or whatever, where servers accept tips, you will leave a tip, and that tip will be 20 percent of the total bill, including tax and whatever you’ve spent on alcohol.

You can read the rest, but there’s no need to. I understand that some people grew up tipping 15% (I did), but in 2019 when servers might be making as little as $2.13 an hour, 20% is appropriate.