Copland wrote "El Salón México" between 1932 and 1936, which met with a popular acclaim that contrasted the relative obscurity of most of his previous works. Inspiration for this work came from Copland's vivid recollection of visiting the "Salon Mexico" dancehall where he witnessed a more intimate view of Mexico's nightlife. Copland derived his melodic material for this piece freely from two collections of Mexican folk tunes, changing pitches and varying rhythms. The use of a folk tune with variations set in a symphonic context started a pattern he repeated in many of his most successful works right on through the 1940s. It also marked a shift in emphasis from a unified musical structure to the rhetorical effect the music might have on an audience and showed Copland refining a simplified, more accessible musical language.