We have had just one car since 1998. Just a few months after we moved to Berkeley we sold Kevin's car since he never drove it. Every once in a while we would need a 2nd car, like if one of us worked late and didn't want to take public transportation home. In those rare cases, we rationalized taking a cab, since it was still cheaper than owning another car.
A couple weeks ago, when our car was in the shop after the hot chocolate incident, we REALLY needed a 2nd car. One rainy morning, I had to bike with Lucas to his school, in the rain! He thought it was fun, but I felt pretty guilty toting him around in the rain on my bike. So I came home and signed up for City Car Share (www.citycarshare.org), which I think of as a co-op for cars and trucks.
Today was my first day using this spiffy service. It was so convenient and kind of fun too. At first, I felt a bit conspicous driving a purple car with the CCS logo all over, but what a lifesaver! So if you see someone honk at you from a purple CCS car, it might be me!