America's Music: The Roots of Country is a film that touches on which bar-style music, common in the South US?
America's Music: The Roots of Country:  The film touches on many of the styles of music that make up country music, including: Old-time music, Cajun music, Folk music, Rockabilly, Western music, Western swing, the Bakersfield sound, Honky-tonk and the Nashville sound. Honky-tonk: A honky-tonk (also called honkatonk, honkey-tonk, or tonk) is both a bar that provides country music for the entertainment of its patrons and the style of music played in such establishments.
honky-tonk