Visitors should go hike Twin Peaks on a good day for beautiful views of the city. Takes about an hour or so to climb Twin Peaks
If you like board games and a few hours, Sunset has The Game Parlour which offers food, drinks, and a great selection of board games to play for only $7/person.
Never leave belongings in the car that are visible from the window. San Francisco has a property crime ratio of 1 in 20.