Commuting "European Style"

I typically ride my 8.5 miles, 40 minute commute in shorts and a t-shirt and then take a shower and change into my work clothes at my office. Today, the last day of fall, with the coolness in the air and the fact that I was about to miss the last bus, I decided to bike commute "European style". I have always envied those who could just hop on their bike in their work clothes and walk right into the office. Today was my trial day. It worked great. For reference, here were the conditions at the time I reached my office: sunny, 66 degrees F, SE wind 9 mph (this was a refreshing, cooling headwind), 65% humidity. I am hoping for many more commutes like this this fall!