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Music and Dance play an important part of recreation in many cultures. So do Sports and Hobbies, of course, and sometimes Food and drink.
Drugs are sometimes used as a form of recreation (see [recreational drug use]?)--and, like dancing, sex, and some other forms of recreation, regarded in some or all forms, by very many people for various reasons, as illicit activity.
The Weekend is typically a time for recreation, perhaps (in Western and Muslim cultures) because the Sabbath falls on the Weekend and the Sabbath is "the day of rest." Holidays are also a common time for recreation.