Talk about sticking with a good thing! The Buena Vista has been serving its signature elixir for half a century, and from where we sip nobody does it better. Start with the perfect Irish whiskey, toss in sugar (and coffee, of course), and then add cream aged for 48 hours and frothed to just the right consistency. Lore has it that then-owner Jack Koeppler challenged travel writer Stanton Delaplane to help re-create the "Irish coffee" served at Ireland's Shannon Airport during a trial-and-error session at the bar that lasted through the wee hours of Nov. 10, 1952. And a San Francisco caffeine legend was born. It'll cost you $6. Open 9 a.m. to 2 a.m. Monday through Friday; 8 a.m. to 2 a.m. Saturday and Sunday.