Each year, many new franchisees choose 7-Eleven's birthday as the day to officially open their neighborhood store for business. Grand openings in New Jersey and Florida will double as birthday parties and Slurpee celebrations. Elizabeth, N.J., franchisee Nasser Nasser has invited local dignitaries to a ribbon- and cake-cutting and plans to serve free food with a face-painter and balloon artist for his smallest customers. And in Sanford, an Orlando suburb, the Slurpee street team will be making a special appearance to give away prizes as the new store opens its doors.