[El Diablo]

Ed: There are many cases in which this is NOT optional and there is a REQUIRED service charge of x% per person added.

Daver: Alright, let's do some math here. First off, I've seen this usually be 17-18%, not 20. Let's say a 10 person group where average food tab will be $70/per. $700 food. Now add about $1500 wine for $2200 total tab. If 18% is added to that, that's a $400 tip. Up to about $100 per bottle, I don't worry about it and just tip 20% on the whole thing (ie: 5 bottle of $80 wine = 700 food + 400 wine = 1100 = I would just tip $220). So, let's guess you had 8 bottles of ~$200 wine here. I'd tip 20% on the $700 food for $140 + 160-200 on the wine for $300 to 350. They tacked on $400 at 18%, so you end up paying about $50 to $100 more than I might have total. I would think that was a tad excessive, but eh, $250 per person or $260 per person, whatever. So, numbers please, Dave!