By day, this little spot in downtown Northville is a deli-style luncheonette, with homemade soups and sandwiches. By night, it's an interactive dinner theater, where the guests get involved in the mystery or comedy. The dinner is patterned after a traditional Italian seven-course wedding feast, and the shows take place in a 132-seat theater. The restaurant gets its name because its first expansion entailed knocking a hole in the wall of an adjoining market. A whimsical attitude infuses the entire place. The food is mainstream Italian, delicious and filling.