Waiters and waitresses as well as other members of the hospitality industry sometimes use the term "twenty past four" to identify the position of the cutlery on a place setting. If the cutlery (knife and fork) is laying on the plate at the “twenty past four” marker of a plate (the same position you’d find the hands of a clock at that time) it generally indicates that the customer has finished their meal and wants the plate to be cleared away.
In many parts of the world, including most of Asia, Australia, and several nations in Europe, tipping wait service is not customary. In Japan, leaving a tip for your waiter it is actually perceived as an insult. In the Americas, particularly in the United States, tipping is almost compulsory as it often makes up most of the server’s income. Perhaps the most outlandish tipping story in the United States occurred in 1984, when waitress Phyllis Penzo was tipped with half a share of a lottery ticket. Robert Cunningham, a police detective, offered to tip her half of a lottery ticket. The two picked three numbers each, and on March 30, Cunningham walked to a store across the street to purchase the ticket. Unbelievably, the ticket won $6 million dollars. When Cunningham called Penzo the next morning to share the good news, she didn’t believe him at first as it was on April fool’s Day! Amazing as it sounds, the ticket was actually a winner and they split the winnings equally between the two of them.