Well then, you apparently want to read Edmund Goulding's Dark Victory by Matthew Kennedy, which, according to Wikipedia, "says that it was widely known in Hollywood that Goulding was bisexual, and hosted wild parties for all persuasions."

Hm, Mr Kennedy has written an entry for Goulding at glbtq ("an encyclopedia of gay, lesbian, bisexual, transgender and queer culture") with some interesting comments: "There is a paradox to Goulding. His sensitivity to women's emotions brought him enduring success, as witnessed by his swooning melodramas, but his private life reflects a lack of sensitivity. Goulding was bisexual, with a decided taste for promiscuity and voyeurism. His sex parties and casting couch were notorious."

He and Gresham make quite a pair!