Music of The Grateful Dead, Jerry Garcia Band and more! Legendary organist Melvin Seals (Jerry Garcia Band) and guitarist Mark Karan (Ratdog & The Other Ones), with Terrapin Flyer, bring their live show to the JCC Hart Theater. Performing music of The Grateful Dead and Jerry Garcia Band, (as well as some other interesting covers), these powerhouse talents have been delighting legions of Deadheads and classic rock fans across the nation.