Dajax wrote:So it's time to pick some ballads for our classic rock cover band that does mostly 60s-70s era tunes. I came up with "Angel" by Hendrix, and "Out Of The Blue" by the band. BUZZZZZ! "Sorry, too obscure". So instead I get to play frigging "Wonderful Tonight" for the fifty billionth time 
Well Dax, It is, after all a "Classic Rock Cover Band" Wonderful Tonight certainly fits the bill.
anyways,
I'm sure you can play it as well as anybody and , if I was listening to you , a Guinness in hand, I would probably enjoy it!
If the new bandmates prove to be uncompromising in doing at least some songs that you like, it may be that they just wont (or worst, can't)
work out unfamiliar material.
In that case, consider forming your own band, and run it the way you wanna!
Howlin'