Jacob Gottlieb, founder of New York–based Visium Asset Management, gathers with prominent hedge fund managers once a month for leisurely poker games that focus more on talking business than making money. The crew includes some of the industry's best-known names, like Avenue Capital Group's Marc Lasry and Saba Capital Management's Boaz Weinstein. Gottlieb is no stranger to making bets. His ability to make prescient calls, particularly in the healthcare industry, has helped him grow his multistrategy hedge fund firm into one of the largest and most successful in the world over the past ten years. Visium Balanced Fund, the firm's flagship long-short equity healthcare fund, returned 14.2 percent and 17.05 percent its first two years of business, respectively, propelling the fund's assets up to…