My wife and I visited the Bay Area a couple of weeks ago. Our plan was open-ended and started with a one-way ticket to Oakland and two nights at the Westin in Union Square. Since parking in San Francisco is expensive, we decided to forgo renting a car at the airport and took an Uber into the city.
After exploring the city for a bit, we decided to head up north and visit some wineries. One of the more convenient options to rent a car for the day is the new Audi On Demand service, so we picked up an A4 and headed north.