I've only ever been in original bands where I'm writing the songs. I was never a good enough player to copy other songs. We would do usually one or two covers per set, but they were carefully chosen and played in our band's own style. I tried to be in a Creedence cover band once, but it only lasted one practice, just couldn't pull it off. The drummer in one of my old bands was in a U2 tribute band and the money they raked in was mind-blowing.