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, to almost any type of social dancing as recreation. However, with the emergence of dancesport in modern times, the term has become narrower in scope. It usually refers to the International Standard and International Latin style dances. These styles were developed in England, and are now regulated by the World Dance Council (WDC). In the United States, two additional variations are popular: American Smooth and American Rhythm. “Ballroom dance” refers most often to the ten dances of International Ballroom (or Standard) and International Latin, though the term is also often used interchangeably with the five International Ballroom dances. In the United States and Canada, the American Style (American Smooth and American Rhythm) also exists. The dance technique used for both International and American styles is similar, but International Ballroom allows only closed dance positions, whereas American Smooth allows closed, open and separated dance movements. In addition, different sets of dance figures are usually taught for the two styles. International Latin and American Rhythm have different styling, and have different dance figures in their respective syllabi. Other dances sometimes placed under the umbrella of “ballroom dance” include Nightclub Dances such as Lindy Hop, West Coast Swing, Nightclub Two Step, Hustle, Salsa, and Merengue. The categorization of dances as “ballroom dances” has always been fluid, with new dances or folk dances being added to or removed from the ballroom repertoire from time to time, so no list of subcategories or dances is any more than a description of current practices. There are other dances historically accepted as ballroom dances, and are revived via the Vintage dance movement. Ballroom/Smooth dances are normally danced to Western music (often from the mid-twentieth century), and couples dance counter-clockwise around a rectangular floor following the line of dance. In competitions, competitors are costumed as would be appropriate for a white tie affair, with full gowns for the ladies and bow tie and tail coats for the men; though in American Smooth it is now conventional for the men to abandon the tailsuit in favor of shorter tuxedos, vests, and other creative outfits. Latin/Rhythm dances are commonly danced to contemporary Latin American music, and, with the exception of a few traveling dances (e.g., Samba and Paso Doble), couples do not follow the line of dance but perform their routines more or less in one spot. In competitions, the women are often dressed in short-skirted latin outfits while the men are outfitted in tight-fitting shirts and pants, the goal being to emphasize the dancers’ leg action and body movements.