The term "swing ance" commonly refers to a group of dances that developed concurrently with the swing style of jazz music in the 1920s, '30s and '40s, although the earliest of these dance forms predate swing jazz music. The best known of these dances is the Lindy Hop, a popular partner dance that originated in Harlem and is still danced today. While the majority of swing dances began in African American communities as vernacular African American dances, a number of forms (Balboa, for example) developed within Anglo-American or other ethnic group communities.