Free Security
Would you mess with the Hells Angels? The HAMC once provided security for a free Rolling Stones concert. The club patrolled the Altamont festival in December of 1969 in exchange for free beer. Some smaller bands went on the record stating that they requested security from the HAMC, but they were all denied because the bikers didn't want to hang there.
They Sued Disney—And Won
In 2007, HAMC filed a lawsuit against Walt Disney for their attempt to reference the club in Wild Hogs. Disney agreed to settle this problem out of court (a wise decision) and they agreed to remove the reference to the Angels from their film. A similar issue happened with the design house Alexander McQueen, Zappos, and Saks Fifth Avenue.