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 was also released in 1973 by Roy Ayers on his album Virgo Red, playing vibes instead of singing.”
Roy Ayers, “Brother Louie” instrumental (1973):
Stories, “Brother Louie” (1973):