You want density? Try Japan...

[monotonehell]

Gallery showing photos of impossibly slender buildings around Japan. The antithesis of our plot to height ratios.
All of these houses are liveable apparently. My favourite is the one that has vending machines at ground and living above, Shuz was calling for retail at the bottom of all buildings -- here's his answer.

http://www.bouncingredball.com/2008/12/ ... -in-japan/