The WYO Performing Arts and Education Center will present “Mamma Mia,” the heartwarming, beloved musical this October, with a Premiere evening set for Oct. 14 and encore performances Oct. 15 and Oct. 19-22. The show’s Premiere evening will take the place of what has traditionally been known as WYO Gala. The Premiere will boast the festive flair theater goers have come to expect, with passed hors d’oeuvres and cocktails. Theatergoers are also invited – but not required – to dress…