Here's the nutshell version: The Buena Vista is a bar down near the wharf that was founded in 1916. Its claim to fame is the successful re-creation and subsequent introduction of Irish Coffee to America. Yes, Irish Coffee, that delicious mix of sugar, whipping cream, whiskey, and java that warms you up, cools you down, and makes you happy down in your soul.
... There are few things as soothing to the spirit as a well-prepared Irish coffee. And Buena Vista is the most storied spot in the city to enjoy one. It’s been a staple of SF now for over 124 years and four generations, serving up that whiskey-laced coffee as it’s signature drink since the 1950s.