I had a 15m walk to the office when I lived in San Francisco... The culture is such that people are willing to sacrifice ridiculous things for merely being able to maintain a life style they do not like. Unfortunately, I now have 0 commute time :) But I go for walks at least twice per day. People work pretty hard in order to get themselves into very unhealthy living situations, and often seem to be unwilling to work for 5 minutes per day to get out of them. I'm not placing blame, just describing the situation.
Beware of the ol' "I have a job so I can afford a car to go to work..." or "I'm working out so I can feel good about myself so I can feel worthy of women/love" or any self-unfulfilling prophecy. A comment above about the guy's friends working out in order to get chicks... It's another thing I find quite strange. Sure, there are like 2% of girls who are only attracted to very muscular men (and they're rarely the most attractive) - but 98% of girls want a "real man". What is a real man? Well, I'm not going to say because I don't want to get my comment killed again :D However, spending so much time and concern on how you physically look is feminine, not masculine. Just inquire with some girls sometime; they'll tell you they're sick of it! Unless you're trying to cultivate beyond the body & mind, then 15m of strenuous exercise 3 times per week is all you need. Spending hours curling in front of gym mirrors is a beauty contest in fetishized insecurity.