Like many music genres, the term of Rhythm and Blues is an umbrella term that covers a variety of music, referring to the rhythm of the backbeat that was influenced by rock and roll, while the chord changes were reminiscent of the blues. R&B’s origins can be rooted in jazz, blues, and gospel.
The image of Disco is forever immortalized in the Saturday Night Fever movie poster as John Travolta struck the famous 'disco pose'. The film glamorized the disco culture as an era where leisure-suit clad men danced their way from one discotheque to another, looking for romantic adventure. Disco received its name from these clubs that played nothing but dance music, with or without lyrics.
Funk is an offshoot of R&B music that emphasized the finer points of Jazz and Soul. One of the greatest influences of funk was the new emphasis on the bass guitar, an instrument hardly used in rock bands of that era, but now a requirement. Especially common in funk songs was the use of the slap bass technique, a style that is generally credited to Larry Graham of Sly and the Family Stone.