They had this in Korea when I was there a decade ago! It works fine, but people's reaction on hearing this is always interesting, ranging from: - enthusiasm:

They had this in Korea when I was there a decade ago! It works fine, but people's reaction on hearing this is always interesting, ranging from: - enthusiasm: that's awesome everyone should do that - skepticism: that seems like a terrible idea, people will un-press your floor and chaos will follow - denial: you didn't see that - cultural / racist: that would never work in <name your country> it must just be because Koreans are <random cultural conjecture>