Grateful Mondays (photo: Ria Burman) Grateful Mondays at Terrapin Crossroads in San Rafael rocked, featuring Marty Schwartz (who has a sweet guitar teaching YouTube channel here) Josh Martin, Scott Guberman, Brian Rashap, and Ezra Lipp, all fantastic musicians. They reveled in playing Grateful Dead songs through the night at the cozy, versatile venue founded by Phil Lesh.