Tragedy inspires works performed this weekend in Lexington. “On the Verge” Theater's production of Yasmina Resa's “God of Carnage” is performed over the next two weekends at the Downtown Arts Center. This is on “The Verge's” first play in a formal theater. Their previous productions have been site-specific works performed in antebellum homes and a funeral parlor. This time the play involves two couples and the actors are real life couples. The Lexington Philharmonic's “Human Spirit” concert is Friday and features works written in troubled times. They’ll dedicate a plaque in honor of George Zack, who directed the Phil for 37 years.