When you're ready to take in the sights, San Francisco offers a few free parking possibilities to look for. You can find free metered parking throughout the city on Sundays all day, and on weekdays after 6pm, including on nearby Market Street and throughout SoMA and Union Square. You can also find short-term free parking wherever you see green street curbs.Hotel Nikko offers valet parking with in and out privileges, so you can drive out and explore.