In the summer I will were my kit to work because it's too hot to were my usual jeans, so it would be harder to tell I'm commuting except for the panniers with my work cloths. During the winter I'll were jeans or dress pants.
I live south of Miami and commute to Florida City. 9 miles one way. I've actually ridden to work and not seen another bike rider. Normally I might see half a dozen bikes and in the morning I pass my truck mechanic as he's going to work.
The Bike Path runs along the Bus rout and I have actually ridden to or from work without ever being passed by a bus going by. Just shows that it's faster to ride my bike than take public transportation to get to work.
Bob