"Exclusive membership" has never been as common as it is at BJ's Wholesale Club. The firm is the nation's #3 membership warehouse club (far behind leaders Costco and SAM'S CLUB) and #1 in New England, with more than nine million members and 200-plus locations in 15 states, mostly along the Eastern Seaboard. Food, including canned, fresh, and frozen items, accounts for about 75% of sales at...