My band mates used to have a grunge covers band but played the interesting, great songs rather than the popular classics. It didn't go well, everyone just wanted Smells Like Teen Spirit, Alive, Black Hole Sun and Man In The Box while they were playing Sweet Young Thing by Mudhoney and Greasebox by Tad and Love Buzz by Nirvana.
This is why I won't do covers. I don't want to play the standard classics.