For most of its 74 years, the Wisconsin Cheese Mart was a sleepy little shop on Old World Third Street. Originally in the old Metropolitan Block building, across an alley from Usinger's, the store moved a half block north in 1976 after its historic edifice burned. The mart ran through a succession of owners, and at times seemed to be as much a deli as a cheese retailer. Enter Ken McNulty, who bought the business in 2003 and woke it up.