Desc: Up in Mabel's Room: Directed by Allan Dwan. With Marjorie Reynolds, Dennis O'Keefe, Gail Patrick, Mischa Auer. Newly-married Gary Ainsworth once gave his former sweetheart Mabel a sexy negligee with his initials embroidered in the lacework. It is Gary's unenviable task to retrieve the incriminating undergarment from Mabel's room.