tipping before tax or after tax...

I had chicken & waffles @ Gussie's on Eddy near Fillmore a couple of months ago and on the receipt it gives you options on gratuity. And those tipping options are before tax.

I'm sure most servers will want you to tip after tax and @ those restaurants that add the SF Health tax on your bill after that added expense too...

Tax in San Francisco is 9.5% therefore if you double the tax 19% is more than a fair tip...

I usually tip a bit more if I don't have a beverage...