Written and originally recorded by Hot Chocolate (UK #7 1973).
Other hit version by Stories (US #1 1973).
Also recorded by Roy Ayers (1973).
From the wiki: “‘Brother Louie’ is a song about an interracial love affair, written and sung by Errol Brown and Tony Wilson of the group Hot Chocolate (‘You Sexy Thing’). It was a Top 10 hit on the UK Singles Chart for the band in 1973, produced by Mickie Most (The Animals, Herman’s Hermits, The Jeff Beck Group), and featured Alexis Korner with a spoken-word lyric.
“‘Brother Louie’ was covered by the American band Stories (featuring singer Ian Lloyd) about six months after Hot Chocolate’s UK hit. Another cover – an instrumental arrangement – was also released in 1973 by Roy Ayers on his album Virgo Red, playing vibes in place of vocals.”
Roy Ayers, “Brother Louie” instrumental (1973):
Stories, “Brother Louie” (1973):