It really depends where you are. I've been a Zipcar member for around 5 years now. I always have that experience in New York, so I have to plan a week in advanc

It really depends where you are. I've been a Zipcar member for around 5 years now. I always have that experience in New York, so I have to plan a week in advance. However, when I visit San Francisco I can usually find a car on the same block as me, even at the beginning or in the middle of the weekend.