Dead & Company — Mickey Hart, Bill Kreutzmann, John Mayer, Bob Weir, Oteil Burbridge and Jeff Chimenti — will perform a free concert for “fans, friends and family” at San Francisco’s historic Fillmore (capacity 1,150) on May 23.

Tickets to this special concert will be made available at beginning on Thursday, May 19, starting at noon PT. For those who receive tickets, the band asks in return that they “pay it forward in some way, large or small.” A release announcing the show reads “please share your good deeds and generosity with us, and let the cosmos know how you are paying it forward, by using the hashtag #DeadandCoSF.”