It's not surprising that this single from Detroit drummer Paul Humphrey has one foot in the disco camp, since it's from the soundtrack of a 1974 blaxploitation flick, Black Fist, in which star Richard Lawson plays a streetfighter who goes to work for a gangster.
Philip Michael Thomas (Miami Vice) and Dabney Coleman are the most recognizable names in the cast, which also includes Edward James Olmos making his screen debut.
Although the film came out in '74 the soundtrack album, featuring disco and funk tracks from various artists, wasn't released until 1977.
Paul Humphrey's contribution was also released as a single (b/w Bionic Salsa).
Neither the Black Fist soundtrack nor any of Paul Humphrey's recordings, including his 1971 hit Cool Aid (credited to Paul Humphrey and the Cool Aid Chemists), are available as downloads, despite what iTunes may think. That site has managed to confuse the drummer with a Toronto-based singer of the same name. The Paul Humphrey and Cool Aid Chemists album (1971) is available on a Japanese CD, but prices start at about $30.
So, in the meantime here's Cool Aid.