Britain has recent by been described as a "leisure society." This is because there are a great variety of leisure pursuits. Young people generally go out on Friday or Saturday nights to a disco, to a concert or to a pub. In recent years going out for a meal or getting a take-away meal have become popular too. During the past years there is a great increase in keeping fit and staying healthy. A lot of teens started running, jogging and going to different fitness clubs in their spare time. Aerobics classes and fitness clubs opened in every town, and the number of recreation centres greatly increased. Indoor pools, with their wave-making machines, water slides and tropical vegetation, have became very popular.