Tipping is a confusing business. It could get you arrested in North Korea, it's outlawed in China, frowned upon in Japan, discouraged on some cruise ships and expected in the Vatican City. And don't even think about not doing it in New York, or you'll get a lecture from your waiter. In Las Vegas, it's assumed that big winners will share up to 10% of a jackpot with their (often underpaid) casino dealer. A recent U.S. poll found that nearly 40% of Americans hate to tip, while a worldwide survey of small luxury hotels showed that one-third of guests refuse to--and those who do tip-ically fork out less than 5% of the bill. One way to avoid awkward moments when the check arrives is to glean tips on gracious gratuity-giving around the world from the Original Tipping Page website (www.tipping.org). It even offers a handy tip rate-calculator. You're welcome.