A dance party (also referred to as a dance) is a social gathering where dancing is the primary activity. Some dance parties are held in a casual setting and open to the public, such as a rave, or those held in nightclubs and discothèques. Other types of dance parties may be a formal or semi-formal private event which often require guests to don formal wear and have an invitation or membership within the community hosting the event, such as school dances and cotillions.