Metallica

Don't get me wrong, I like Metallica. I just can't imagine how long the concert would have to be to fit in all the hits and some new stuff from the album they'd be out promoting. So many 6+ minute songs and as a general rule of thumb live songs run longer than album tracks b/c of improvised solos etc.

They could maybe try to play something more obscure, but it would be too non-mainstream for them.