WGN America presents a ‘witches playground’ at SXSW’s Film Opening Party, celebrating the innovative festival and season two of the national cable network’s provocative, supernatural thriller, “Salem.”  Serving as the official opening festivity of SXSW Film, the event will be held at the historically haunted Speakeasy on the Avenue, Friday, March 13, beginning at 10 p.m.  The “Salem” at SXSW celebration will be an unforgettable experience, with soothsayers, levitating enchantresses, apothecaries, and “Salem” stars.