Zipcar operates a membership-based car-sharing service in over fifty cities in the U.S., Canada and the U.K. Though the company makes mistakes (hello? pulled out of L.A.??), the car-sharing concept is terrific. Zipcar originally banned pets from its cars, but its current pet policy is sensible:

We understand that Fido and Tigger need to go to the vet on occasion. … Read the rest