The Wetlands opened in New York City in 1987 and became “ground zero for post-Grateful Dead jam bands”.  

This poster from Psychedelic Fest on May 9, 1990 has some cool music history on it.  

Autographed by Tom Constanten, keyboardist for Grateful Dead (1968-70), it features Merl Saunders who collaborated with Jerry Garcia on many projects.

Also included John Popper the year his band Blues Traveler released their first album.  

El Chicano was a well known Los Angeles rock/funk/soul group fronted by Bobby Espinosa who was a member of the East LA surf group Mickey & The Invaders.