Next weekend, former members of Dark Star Orchestra will play a special anniversary show at the location of the band’s first ever performance, 20 years to the day since that live debut, JamBase reports.

The Grateful Dead tribute act first performed together on November 11, 1997, at Martyrs’ in Chicago, and members of the group’s lineup from that year–John Kadlecik, Mike Maraat, Kevin Rosen and Ahmer Nizam–will honor the anniversary with “Dark Star Originals: DSO’s 20th Class Reunion” at the same venue, featuring special guest John Kattke.

Also on November 11, the current DSO lineup will be celebrating the band’s 20th anniversary with a show at the Palace Theatre in Albany, NY.