The Wagner Society of New York will present its “Lohengrin” seminar led by current Metropolitan Opera cast members, Tamara Wilson, Günther Groissböck, Brian Mulligan, and Errin Duane Brooks. The 42nd annual seminar by the Wagner Society which coincides with the Met’s current production “Lohengrin” will include various presentations, interviews, and live performance demonstrations. Met Opera Orchestra pianist and lecturer Jeffrey {…}