Re: We haven't had a conversation about tipping in awhile
I always double the tax (and with tax rates here being 8.5%-8.75% that's well over 15%) if the service is good, and start deducting percentage points for things that aren't satisfactory. I've left without tipping before but that's only when things regarding the server themselves were just outright terrible.
"I'm a fan of good sci-fi. Star Trek. Battlestar. That Joss Whedon show." - Nathan Fillion, Castle