Steele Bike,
I still drive (when I have to) the same POS truck that I drove when I was in college. I'm 28, and I actually enjoy the looks I get from co-workers who think I'm crazy when I show up everyday on my bike. If you are willing to show up to work after at least a glistening sweat that could cause you to stink, you shouldn't worry about people thinking you are too poor to own a car.