I do data entry and computer database administration. The powers-that-be at my office are interested in eco-friendly stuff so they kind of think it's cute that I commute by bike, but most of them are not about to give up car-commuting themselves.

Considering the problems of cost/difficulty of parking in central Philadelphia, lots more people would get here by some mode of travel other than a car if they lived within 5 miles (like I do) or within a short distance of a train to central Philadelphia.