I recently joined Citibike and I have to say that I love it. Especially down the West Side Highway. It's thoroughly enjoyable to get up and ride my bike to Chelsea for rehearsals and even though I find myself tired at the end of the day, I still enjoy the bike ride home. I love that I'm not contributing to any air pollution and that I'm also not burning up and crowded on the subway. It's economical and great exercise. So now, I basically try to get my exercise from traveling. We'll see how long this lasts - but for now, I think it's great.
One caveat is that if I have tv or film auditions where I need to look great, I know to just bring makeup and get changed/do my makeup once I arrive at the casting office. I have yet to take a bike ride where I didn't sweat it up. So, there's that.