After some conversation with my Korean girlfriend and peers, I found that Korea has a fixed gear sub-culture. This involves fixed/single-speed bicycles, crews, and alleycat races. Korea neither uses Bicycle Couriers/Messengers in the quantity that North America or Northern Europe uses them. So how exactly did this culture come about?

Apparently, it was just based off of the popularity of Fixed Gear Freestyle -- which I never really knew existed outside of BMX.