One of the people Manson hung out with was a member of the Beach Boys. I dont recall which one. This member of the Beach Boys introduced Charlie to Terry Melcher, a record producer. Terry was Doris Days son.
Terry Melcher was one lucky son of a gun. He had lived in that house with his girlfriend, Candace Bergen and Mark Lindsay (Paul Revere & the Raiders).
I worked for Mark a few times and he said that Charlie showed up to a few parties there.
Then, Candace broke it off with Terry, so they moved out. Charlie was not informed of this when he sent his gang there.