Ballroom dance is a set of partner dances, which are enjoyed both socially and competitively around the world. Because of its performance and entertainment aspects, ballroom dance is also widely enjoyed on stage, film, and television. Ballroom dance may refer, at its widest definition, to almost any type of partner dancing as recreation. However, with the emergence of dancesport in modern times, the term has become narrower in scope, and traditionally refers to the five International Standard and five International Latin style dances (see dance categories below). The two styles, while differing in technique, rhythm and costumes, exemplify core elements of ballroom dancing such as control and cohesiveness. Developed in England, the two styles are now regulated by the World Dance Council (WDC) and the World DanceSport Federation (WDSF). In the United States, two additional variations are popular: American Smooth and American Rhythm, which combine elements of the Standard and Latin styles with influences from other dance traditions. There are also a number of historical dances, and local or national dances, which may be danced in ballrooms or salons. Sequence dancing, in pairs or other formations, is still a popular style of ballroom dance.