<p>A portfolio manager for an investment fund founded by financier George Soros sexually abused women at a Manhattan penthouse dungeon, according to a $27 million Brooklyn federal court suit. Howie Rubin, 62, whose high stakes dealing was featured in the best-selling books “Liar’s Poker” and “The Big Short,” rented the lavish Metropolitan Tower pad in Midtown to indulge in brutal sex with women whom he paid between $2000 and $5000 per session, according to the suit filed Thursday.</p>