There is a book called Weird scenes inside the canyon by David Mcgowen. He also did some interviews that are still on you tube. Very interesting stuff.
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OH YES! I’ve run into that name... not youtube, but written sources. He either is author or cited by author. Thanks for mentioning him. I’ll pay attention to his work as I process this rather large pile of material I’ve gathered.
Reading this now, thanks to your suggestion. The book triggers two memories. The most recent is about Brice Taylor's book Thanks for the Memories .... Taylor describes L.A.-area parties where there would be multiple bowls of different drugs, free for the taking. The second is about my one truly rockstar friend, a member of a major U.S. band and author of '70s songs you'd instantly recognize. Long before I heard of Brice Taylor, this friend described similar parties. At one such party, he made a decision that he says saved his life -- he just dropped out of the rock scene, became a solo artist, and never turned back, except for occasional drop-in visits with his old band.
The friend never mentioned the Satanism that appears in both books, but I will certainly ask him the next time I see him.
Many of these people sold their soul to the Devil, and it appears that many were pleased if not happy with the bargain.