A nightclub (or "night club" or "club") is a rinking, dancing, and entertainment venue which does its primary business after dark. A nightclub is usually distinguished from bars, pubs or taverns, by the inclusion of a dance floor and a DJ booth, where a DJ plays recorded dance and pop music. Some nightclubs have other forms of entertainment, such as comedians, "go-go" dancers, a floor show or strippers (see strip club). The music in nightclubs is either live bands or, more commonly a mix of songs played by a DJ through a powerful PA system. Most clubs or club nights cater to certain music genres, such as house music, garage, Hip-Hop, or salsa.