At Union Congregational Church. The Ridgewood Gilbert & Sullivan Opera Co. is performing Ruddigore (The Witch's Curse) to benefit the Interfaith Hospitality Network for the homeless families of Essex County. If you love opera or if you've never been introduced, this is an opportunity for you and members of your congregation to experience the opera and support IHN at the same time. Ruddigore is a ghost story but don't worry. It is funny and has a typical G and S happy ending. It features some of Gilbert's wittiest words and Sullivan's most beautiful music. It has charmed audiences around the world for over 100 years. Admission: $25 for adults, $15 for children under 12. Tickets: www.ihnessexnj.org or (973) 313-0011.