Beginnings as Satanist

Becoming a local celebrity through his paranormal research and live performances as an organist, including playing the Wurlitzer at the Lost Weekend cocktail lounge, he attracted many San Francisco notables to his parties. Guests included Carin de Plessin, Michael Harner, Chester A. Arthur III, Forrest J. Ackerman, Fritz Leiber, Dr. Cecil E. Nixon, and Kenneth Anger.

LaVey began presenting Friday night lectures on the occult to what he called a "Magic Circle" of associates who shared his interests. A member of this circle suggested that he had the basis for a new religion. On Walpurgisnacht, April 30, 1966, he ritualistically shaved his head in the tradition of ancient executioners, declared the founding of the Church of Satan and proclaimed 1966 as "the year One", Anno Satanas—the first year of the Age of Satan. Media attention followed the subsequent Satanic wedding ceremony of radical journalist John Raymond to New York socialite Judith Case on February 1, 1967. The Los Angeles Times and San Francisco Chronicle were among the newspapers that printed articles dubbing him "The Black Pope". LaVey performed Satanic baptisms (including one for Zeena) and Satanic funerals (including one for naval machinist-repairman third-class Edward Olsen, complete with a chrome-helmeted honor guard), and released a record album entitled The Satanic Mass.

In the late 1960s and early 1970s, LaVey melded ideological influences from Ayn Rand,[8] Friedrich Nietzsche, Aleister Crowley,[9] H.L. Mencken, and Jack London with the ideology and ritual practices of the Church of Satan. He wrote essays introduced with reworked excerpts from Ragnar Redbeard’s Might is Right and concluded with “Satanized” versions of John Dee’s Enochian Keys to create books such as The Satanic Bible, The Compleat Witch (re-released in 1989 as The Satanic Witch), and The Satanic Rituals.

Due to increasing visibility through his books, LaVey was the subject of numerous articles in the news media throughout the world, including popular magazines such as Look, McCall's, Newsweek, and TIME, and men’s magazines. He also appeared on talk shows such as Joe Pyne, Phil Donahue, and Johnny Carson, and in a feature length documentary called Satanis: The Devil's Mass in 1970.