Other regulars include Richard A. Grasso , the former chairman of the New York Stock Exchange ; Ronald O. Perelman , the 1980 's - era takeover magnate and the chairman of Revlon ; David H. Komansky , the former chief executive of Merrill Lynch ; A. Alfred Taubman , the former chairman of Sotheby 's ; and Bruce Wasserstein , the chairman and chief executive of Lazard and Mr. Perella 's former business partner .