Check out this really interesting video from National Geographic which shows rare footage of Pyongyang city in North Korea. Skip to 02:12 (or don't) to see a big concrete skatepark which appears to be filled with 99% Rollerbladers.

It's a country which is often reported in the western media as being oppressed. Maybe this is what happens to your rollerblading scene when you protect your population from MTV, the X-games and 'Lil Wayne!