Five years ago, Toys 'R' Us opened 350 holiday express pop-up stores during the fourth quarter. The program was vastly scaled back the following year and has pretty much disappeared. And while TRU wasn’t the first to implement a pop-up concept, its efforts in 2009 gave rise to a wide array of much smaller—often single-unit pop-ups—that have been as much about promotion as … [Read more...] about Variations on a Retail Theme