"I have six hours of music coming up tonight," says John Mayer. In a little while, he'll take the stage in Atlanta with Dead & Company – featuring Grateful Dead alum Bob Weir, Mickey Hart and Bill Kreutzmann. After that, Mayer will play a surprise midnight club gig with Dave Chappelle, one of several pop-up shows they've been doing since last spring. "I'm sort of the acoustic
This article originally appeared on www.rollingstone.com: John Mayer on Katy Perry, Learning From the Dead, Embracing Pot