I am blessed with a short 6 mile commute in Michigan and office attire is slacks and a polo shirt. Rain gear for getting caught out in it and layers for winter all work well with the casual business attire. I ride at an easy pace, averaging 12.3 mph so I don't break a sweat and thoroughly enjoy my commute with the added benefit that I am getting a 30 to 40 minute easy workout twice a day as part of my work life. In the morning I wear a safety orange mesh vest I had to buy as part of my cycling kit back in 2008-2009 when I was doing a phone system on a Homeland Security base where all cyclists had to wear a safety-high visibility vest. It helps with the early morning coffee drinkers and smart phone addicts that are also trying to operate 2 tons of junk. If you have a locker and shower at work that would be so cool. You could choose to dress differently and either make it a serious workout or not, depending on your needs and desires. The best thing we can do as a community however (in my opinion) is to wear normal clothing and operate a bike within the parameters of the law as much as possible alongside the cagers. It's a slow process: Evolution, and some of the auto operators will never get it that we share the roads and this is our mode of transportation, be it a lifestyle choice or a necessity.