'How was your weekend?' This question comes up at workplaces all over the United States every Monday morning as people greet each other. It is another way of saying, 'How did you spend your leisure time?' In the Unites States the way people spend their leisure time is an important part of their identity. Perhaps everybody does nearly the same thing all day in the office or the factory, but leisure time is what makes people distinct and reveals who they are. For many people, leisure time means going somewhere -- to a museum, a concert, a restaurant, or a baseball game. Or it means doing something such as playing volleyball, backpacking, swimming, singing in a chorus (合唱), or playing in a park with their children. For other people, free time means staying home with wonderful sources of entertainment, such as VCR, stereo or cable TV with dozens of channels. Others pursue creative activities such as cooking, gardening, and home improvement. The latest stay-at, home activity is 'surfing (冲浪) the net' -- that is, looking for information and entertainment on the Internet. In the United States, leisure time is big business. Enormous amounts of money are spent by competing enterprises that make and sell the goods and services that people use in their free time. In fact, shopping itself is an important leisure time activity. Spending a day at a giant mall has become, for some people, as interesting as spending the day at museum or amusement park. People in the United States are ultimately not much different from others in what they do in their leisure time. The real difference may lie in the energy, time, money, and sheer enthusiasm that they devote to it. Why do Americans often greet each other by asking 'How did you spend your leisure time?'