I drew the line at anything by Coldplay. But really, if you're playing that kind of music you don't have much say in what you get to play.
I've just rejoined my old brass band. If you think the modern covers band repertoire is a problem, wait until you hear Frank Baernarts take on it. There's no point in being precious about it, if you are then as BigRedX says stick to originals, or traditional music.