Dec. 8-11. (The evening performance is followed by a dessert sing-along  ($25)  in the Michigan League Hussey Room.) David Andrews directs this accomplished town-and-gown company in Gilbert and Sullivan’s comic operetta about the romance between a young lady and a young man mistakenly apprenticed to an inept band of pirates when he was a boy. The ensuing madcap chaos is peppered with songs like “Poor Wand’ring Ones,” “I Am the Very Model of a Modern Major General,” and the pirates’ theme song, “With Cat-Like Tread,” better known as “Hail, Hail, the Gang’s All Here.” 8 p.m. (Thurs.-Sat.), 1 p.m. (Sat.), & 2 p.m. (Sun.), Lydia Mendelssohn Theater. $30 (seniors, $27; students with ID, $15) in advance at the Michigan League Ticket Office, muto.umich.edu, and at the door. 763–8587.