My partner and I had dinner at Babbo this week with two out-of-town friends. The meal was primo, and the service, from the waiter and the wine person to the host and busboy, was top-notch all the way. Although we split the bill two ways, the tip was determined by one of our friends, who doubled the tax so the tip came to about 16% -plus, the tax being 8 percent-plus here in Manhattan. I felt that this as too little and told my friend so after leaving. He replied that doubling the tax was the standard here in NYC, although as I said, he is from out-of-town and does not often eat in top NYC places. Later in private, my partner suggested that, rather than upbraiding our friend about his "cheapness," I should have put cash down on the table in the amount I felt was proper to make up a proper tip amount. My questions: What is the standard or accepted amount for a tip after a meal such as I described? Would adding to the tip in cash (the bill was paid by credit card) be a good solution if I felt the tip was too small? Thanks for helping settle a minor dispute!!!!!!!