For an opera named after a bat, “Die Fledermaus” has plenty of endearing qualities for opera and operetta fans: mistaken identity; sweet revenge; comedy; a womanizing and insulting husband who gets ...

Verdi's "Un Ballo in Maschera" ("A Masked Ball") opened San Francisco Opera's 102nd season on Friday at the War Memorial Opera House, with many of the nearly 3,000 attendees sporting masks (decorative ...