We had a day at the club once where we had World Party (and two openers) in the afternoon and Fish (from Marillion - with two openers) in the evening. World Party insisted on an 8' grand.
For one song.
So we had to get that fucker up on stage, tuned, and mic'd for one fucking song, then get it down and out the door before we could load in a fuckin' 28-input band.
And two openers.
In the world, there are dilettantes. It was super-gratifying to see that half-empty room and it's never gratifying to see a half-empty room.