Free gold watch
Pacific Pinball Museum (just across the bay in alameda)

+1. Both fantastic places!

Musee Mechanique at the pier is fun too. They usually only have one or two pins but there are baseball games and other EM games and penny arcade machines which are fun and facinating.

Parking at the pier is a ripoff and a nightmare though.

There's an app for that.

Yup... Uber. Suppose you could try SFPark if your brave enough to drive down there. It's not really too bad, just be prepared to spend $35.00 on parking.

Uber and Lyft are great as everyone already knows especially in SF. Want to travel for half price or less? Then share your ride with others using Uber Pool and Lyft Line (inside each app) - takes a bit longer but much cheaper especially for longer trips.