On the Grateful Dead
From the book Missouri & Me

Grateful Dead shows were a gathering of like-minded people. They were a big party. People would trip about and shake their bones to the music with thousands of their best friends, most of whom they’d never met. Each show was a joyful celebration and various psychedelic drugs were, for many or most, a big part of that celebration; Frodo and I were eager partakers. He and I often traveled to shows together and Frodo had just joined us at the bar.