Not that anyone cares, but I don't want to live that way. I certainly understand how many love the urban life, I just prefer suburbia, thanks.
That being said, a more relevant question is what the societal effects would be. My first question is how this would affect crime rates. A quick search seems to indicate that crime rate may go up with population density, though other factors are, of course, more highly correlated (such as poverty).
Some of those other factors also correlate highly with high density areas. No clue what the causative links are ... could be that density has no effect, or even reduces crime rate, I suppose - I'm way to lazy to research it for ta quick hn comment!
I do know that being too close to too many other people makes me think about perpetrating violent crime, though! ;)