Beautifully produced bike video of classy DC bicyclists below.
Cycling in the United States is dominated by hard-core cyclists wearing bright, tight, cycling clothes. It is also quite big with ‘hipsters’ or others in the alternative lifestyle crowd. But, unlike in countries like the Netherlands, Germany, and Denmark, very few normal, mainstream people bicycle for transportation purposes in the US.
Most people think you can’t bike in nice clothes, that you’ll get too sweaty or dirty. But if you bike at a slow, even pace, bicycling is not very energy intensive and you can bike in whatever cycling clothing (including none at all) you like. I even used to bike to work 40 minutes (but slowly) in South Florida.