Zipcars are great. Since I bike commute to work I don't have a car there. I do sometimes need to travel around the city to other offices. I take a Zipcar when ever needed. It doesn't get any easier than this. I just book it and go. I have tossed my bike into the car on occasion. Have even used them on weekends when the family needs to be in 2 places at once. Great idea that works. I can also test drive different cars this way to from Prius to Element to pickup trucks, etc.