Even if you serve the most fair trade ultra organic coffee there is, it doesn't cost you more than 30 cent per cup (Most cafés spend 10 cents. You sell that cup for $ 2, or more, since this is 2015 in San Francisco, and the world is mad.
The guy i mentioned above (http://mrcotton.com/) charges €2.20 which at current rates is over $2.40 for a black coffee, more for cappucio etc. He's usually outside my office for approx 90 mins and some back of the envelope points to him making over $200 in that time. Ant that's not SF, that's Cork Ireland
You might want to edit this comment, not good for a CEO to essentially say his customers are mad to pay what they do for his product. Bring's to mind this guy who destroyed a much larger business with a similar comment: http://www.telegraph.co.uk/news/uknews/1573380/Doing-a-Ratne...