Twisted financier Howard Rubin has a “fixation” with “Fifty Shades of Grey” — and even based his notorious ‘dungeon room’ on the movie. The retired banker, deemed to be worth over $50 million in court papers, converted a room in his Central Park Penthouse to be entirely red and filled with sex toys, just like the 2015 Jamie Dornan and Dakota Fanning erotic thriller, based on the novel by writer EL James.