Conversation so far:
what year was Ron \Pigpen\ McKernan born?
CANNOTANSWER.
Are there any other interesting aspects about this article?
He developed a close friendship with fellow keyboardist Tom Constanten based on their mutual aversion to psychedelics and.
What happen with the keyboardist?
eventually served as best man at Constanten's first wedding.
When did he get married?
CANNOTANSWER.
What happen in his personal life?
In the early years of the Grateful Dead, McKernan was easily recognisable by his biker image, making him a minor celebrity.

Question: What was his biker image?
Self-contained rewrite: What was Ron McKernan's biker image?