A sports store with custom-built bleachers for watch parties. A nap room disguised as a mattress store. A gourmet Popsicle shop featuring ingredients from around the globe. These are just some of the newest tenants at Lincoln Road, a seaside, mile-long pedestrian corridor in Miami Beach, Florida, that ranks with New York’s Fifth Avenue and California’s Rodeo Drive as one of the nation’s toniest shopping districts and a lure for high-end tourists.