Early Jazz song with synthesizer - Solved

While watching the movie Focus on Blu Ray, the first song, I'm a Manchild sounded similar to a song I recalled from a long time ago from the radio in the 1970's and 1980's, and which I had recorded onto a cassette tape, but never noted the name. Fortunately I found a youtube version of I'm a Manchild and one of the comments identified the song it sounded similar to:

Kool & The Gang - Summer Madness (1974)