Tip in cash.
15 to 20%
10% if service was barely average.

Worst thing I hate is a fuuuking empty drink glass.
And if ya walk by repeatedly on a implied task that goes along with your job.
Well...
You want a tip about tips??
Don't work for tips if ya can't fill a glass you are pretending not to see....

Unca suga azz rapes anyone who works and gives that money to those who don't work that vote liberal socialist Democrat for free schit as a way of life.