Just call Richard Gere “Zen Daddy.” The Buddhist actor accompanied his son, Homer James, 11, to the Knicks Basketball Clinic in East Hampton Saturday afternoon, but he didn’t merely stand on the sidelines. Instead, Gere practiced yoga while watching his son play. A source spotted the star sitting in the “lotus position” through most of the two-hour clinic. He also did some “complicated floor stretches.” Once Gere mellowed out, spies said, he was gracious to other parents before scooping up Homer and heading out. Gere’s rep had no comment. (We were hoping for “Ohhmmmm.”)