Or cashiers, waiters and service workers in general?
I admit it's not something I do very much - as much as I appreciate them being nice, I keep a respectful distance and proper boundaries from them as I recognize it's part of their job to be friendly and chatty and overall I don't want to "hog" them even if the bar is empty.
Plus if I'm alone I prefer to just drink and collect my thoughts, and if I'm with a guest I naturally prefer to focus on them rather than the bartender.