One of my favorite spots in San Francisco, you will need to know a password to get in, even if its for a private event. I have done multiple corporate events here and its a great venue that is not overly expensive and is a great atmosphere. Once a true speakeasy, it then became a dive bar and is back to being a speakeasy with a great selection of bourbon and rye. Some bourbon that I know are very hard to find can be found and sampled here. If you get a chance to go, you should!
Bourbon & Branch
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