I wore jeans and a t-shirt while riding to lunch with the kids today. And we got rained on, and I was wearing cotton underwear.
Did have wool socks though
Oh, and Five-Ten shoes, so technically it was in fact a mix of cycling-specific and normal clothing.
And on my single-speed....which happens to be a dirt-jumper too small for me to sit down on.
Rigid fork though. Style points for that. Or not.