Yes, these campaigns aren't exactly gorilla-style. But, they are non-traditional. IKEA's changed the game by installing pop-up apartments in the Parisian subway—five people lived in the space for five days—and on Tokyo streets. What better way to sell the potential of maximizing tight living spaces, right? IKEA also took over a portion of Charles de Gualle airport for a spell, kicking the idea of the airport lounge up a notch. Another crazy stunt found 100 people sleeping over at a store in the UK.