I am a solution architect (sort of a sales engineer/program manager) for a Health IT company in San Francisco (South Beach/SOMA). I have my BS in Computer science. Our office is very bike friendly, with indoor bike storage and a shower for those of use with longer commutes. On an average day there are probably 10-20 bikes in an office of about 100 people. Really nice days might have 30 bikes.

While I think there may be a lot of stereo types about who bike to work and why, I think San Francisco is one of the cities that stereotypes are not true as people with all types of jobs, education levels, and financial situations bike to work for many reasons. I see line cooks at restaurants biking to work, but I also see engineers, startup founders, and executives bike to work in and around San Francisco. I am sure many bike-commuters co-workers think they are odd (particularly those of use with longer commutes) but most people I know seem to think its a good thing, even if they think you are crazy for doing it.