Meijer sees 50 percent increase in Halloween shoppers preparing for weekend-long festivities   GRAND RAPIDS, Mich., 2016-Oct-14 — /EPR Retail News/ — With Halloween falling on a Monday this year, consumers will be celebrating throughout the entire weekend. Meijer is already seeing an increase in demand. The Grand Rapids, Mich.-based retailer is seeing as much as a 50 percent…