First released in 1967 on Zodiac Records by Ruby Andrews, A Chicago soul singer. There's probably more cover of this song, but I would like to share with you the Coffee's vesion, a splendid track released in 1980, on Delite Records.
Good to know that the mix is done By Tee Scott, I'm preparing something about him.
The 2 versions are very different, Find your favorite, Enjoy!
Ruby Andrews - Casanova (Your playing Days Are Over]
Coffee - Casanova