The Dead & Company's Madison Square Garden run—which will bring three original members and John Mayer to the venue for two sold-out dates on October 31st and November 1st—has been expanded to include a free November 7th show. The catch? Glad you asked: The band won't be selling tickets to the concert—instead they'll be giving them away. Sign up at the band's website before midnight on October 8th for your chance to win for the show, presented as part of the American Express Unstaged series (and live-streamed for those who don't score seats). Even though tickets are free, fans who attend and watch online are encouraged to donate to NYC anti-poverty organization Robin Hood Foundation.