I worked with Mark Lindsay, who lived in that house with Terry and Terry’s girlfriend at the time - Candace Bergen.
Apparently, had Candy not broken up with Terry, they wouldn’t have moved out and leased it to Polanski and Tate.
He said that Charlie showed up to a few of their parties there.
I knew about the parties and the relationship with Candace Bergen from the book Chaos by Tom O'Neill.
It describes the incidents of that time in incredible detail.
Tom O'Neill goes on to describe a theory that Melcher was much more involved with Manson than he ever admitted. He (O'Neill) gives evidence of this theory, but I found myself somewhat less than completely convinced.