>>63413Traditionally speaking, 15% is the "norm" for tipping. You start at 15% and go up or down depending on the quality of service you receive. If the service was average (Not great but not horrible either), 15% is supposed to suffice. If the service was outstanding, you're suppose to go up to 18%, maybe even 20%, though I know some people who tip as much as 25% and 30%. If the service was very shitty, you're suppose to either leave it at 15% (If you're a generous person), or take it down to 10% or leave no tip at all, though some believe that to be rude regardless.
I think idea is, the more a party spends on a dinner, the more work the staff will be involved in. There's a big difference in a 15% tip from a single diner ordering for only theirself that'll max out around $15 to $20, versus a family of 20 dining for a special occasion that can go as high as $400 to $800 or more.