This was such a great use of space and perspective that I couldn't ignore it! This recent guerrilla promo in the Chamsil District of Seoul, South Korea, involved the molding of the subway station into a grocery store, promoting the grand opening of a new HomePlus supermarket very close to this subway stop. The intended illusion of actually being in the store was quite effective and was created through the inventive use of promotional stickers.
There are two kinds of guerrilla marketing, as I posted before. This particular guerrilla promo effort was a great way to bridge the gap between promotional products (stickers) and utilizing a space effectively (the subway nearest to the grand opening of the supermarket). The only thing I would have liked to see, though, would have been some people in the station doing some giveaways. People are more likely to remember your brand with a product that has your logo on it, as well as with a person-to-person interaction.