Louis B. Mayer, Harry Cohn, Jack Warner, Samuel Goldwyn, Spyros Skouras, Barney Balaban, Dore Schary and MPAA chairman Eric Johnston will be portrayed in “The Waldorf Conference” on stage at Emerson College on Nov. 3. They are members of the 48-strong group which met in the Waldorf-Astoria from Nov.24 to 25, 1947, to set the stage for the Hollywood studios’ cave-in to the House Un-American Activities Committee and its first victims, the Hollywood 10. The program at Emerson will also include a panel discussion on “The Black List and the Patriot Act.” What great timing, as a federal judge in Portland, Ore., declares two provisions of the Patriot Act to be unconstitutional. The panel in this discussion includes the “Waldorf Conference” play’s authors, Nat Segaloff, Dan Kimmel and Arnie Reisman. plus Tony Kahn (son of Gordon K.) and Chris Trumbo (son of Dalton T.). Reisman had also written the Oscar-nominated docu, “Hollywood on Trial” in 1976. A second panel will discuss “Free Speech Across the Disciplines.” Emerson’s professor Maureen Shea produces the event in the Semel Theatre. Kimmel, a Variety reporter in Boston, has also written a book on Hollywood, “I’ll Have What She’s Having.” Reisman’s completing a PBS docu on Helena Rubinstein and Elizabeth Arden, “The Powder and the Glory.” Segaloff is a producer with the Africa Channel.