I was in a mostly original Country, Southern rock band late 70's, early 80's and a woman hired us to play her wedding with very good pay with one stipulation, that we played a certain Bob Seger tune (forgot which one but one of the very overplayed tunes). We grumbled but learned it and being an original band it gradually changed until it really didn't sound a whole lot like the original although we kept the chord structure, lyrics, etc. and we ended up actually liking it and being kind of proud of what we did with it. The woman liked it, the wedding liked it, we got paid and never played it again.