There's a common catchphrase used by fans of the Grateful Dead: Weir Everywhere. Though many people in the scene know Cohen as one of Mayer's close friends, his ties to the Grateful Dead span back much furthur (pun intended) than that. In an interview with NPR Music's resident Deadheads, Andy Cohen opened up about his relationship with one of America's most revered bands. Andy Cohen: I became a Deadhead in high school. Bravo/Heidi Gutman/Bravo via Getty Ima / NBCUniversal Andy Cohen with Bob Weir and Anderson Cooper on Watch What Happens Live in 2022.