Hunter S. Thompson spent time in the 1960’s riding with the San Francisco Chapter of Hell’s Angels. These are a few of the photographs he took at that time. 

No sympathy for the devil; keep that in mind. Buy the ticket, take the ride…and if it occasionally gets a little heavier than what you had in mind, well… maybe chalk it off to forced conscious expansion: Tune in, freak out, get beaten.” Hunter S. Thompson

this is super rad, the book I am reading right now by Hunter S. Thompson is the book he wrote about this experience. Definitely recommend reading Hell’s Angels