I just saw this on "Insomnic with Dave Attell": ScooterMan, a service you can call that sends a sober, fully insured driver to your location to drive you home in your car. The driver arrives on a small scooter that is quickly disassembled, bagged, and stored in the trunk. Someone interviewed on the show said that the cost was about 150% the cost of taking a taxi. What a great idea! Sorry, only available in the Greater London area.