Ok, I am currently in Dalston, current home of ‘cool’, and a quick observation suggests:
Bicycle – Very cool.
Scooters – Lukewarm.
Motorcycles – Don’t be seen dead on one.
Taking it to another level of detail:
Cheap mountain bikes – Uncool.
Modern road bikes – Lukewarm.
Fixies – A bit past it.
Vintage Peugeot road bikes – Cool.
Vintage Peugeot road bikes, singlespeeded with swept-back handlebars – Ice cold. Fairly accurate breakdown of the entirity of London I’d say. Although i’d disagree about motorbikes – needs some sub categories, i.e.
Commuter motorcycle – Dead uncool
Blacked out cafe racer that makes people think the world is ending when it drives by – very cool. Girls like it more than singlespeed road bikes too so that has to be factored in.