It's quite easy to take your bike with you in Copenhagen's trains and metro.
It's also quite easy to Copenhagenize your bike. Just find a basket and adorn it with plastic flowers.
Noone knows who started this trend, as you cannot buy a flower-basket-kit anywhere. It's decorative anarchy - but rather overwhelmingly widespread. A quick glance at my local train station offered no less than 5 flower-baskets...

 

But is this only a Copenhagen phenomenon? I remember seeing some adorned bikes in Amsterdam, but as the Dutch are more into panniers it's not really the same. Or?