I’m a coffee person. Coffee defines the experience. Coffee is the culture. Whole countries, cities and small towns are fueled by coffee. You get off a plane and you are lucky to have options, besides the chain locales.
Starbucks has become McDonald’s. Peets is Burger King. Dunkin Donuts is Dunkin Donuts. You are better off with hotel coffee.
It’s not hard to find the good stuff in SF. Here are my recommendations:
Where is the world’s best coffee? Maybe Indian Coffee House Link