The night before their sold-out show at the TD Garden Tuesday, Winston Marshall and the rest of Mumford & Sons played a secret, hits-heavy set at the Wilbur Theatre for 400 lucky MIX 104.1 listeners. . . . Celts captain Paul Pierce dined the other night at Empire Asian Restaurant & Lounge at the Seaport. . . . Bruins great Derek Sanderson has been chosen as the grand marshal of the Cape Cod St. Patrick’s Parade, which will take place March 9. “Turk,” as he was known to fans and teammates, is the subject of a biopic being produced by Ed Burns. . . . Comedian Jane Condon performed the other night at Canyon Ranch in the Berkshires and actress Kathleen Turner was in the house. . . . 103.3 AMP Radio (WODS-FM) has a new night-time host. His name is Dustin “Slater” Carlson. . . . Promoters of this summer’s Bon Jovi show at Gillette Stadium announced Tuesday that tickets for the July 20 concert will go on sale Feb. 15 at 10 a.m.