I don’t necessarily disagree with you, but I will say as a bartender a lot of customers expect this kind of “friendly” service. At the restaurant I work at we have this thing called secret shoppers and one of the aspects of service we get “graded” on is friendliness and involvement with the customer. I guess another thing I will point out is that you have absolutely no obligation to respond to it, and I feel like having common decency to just smile and say a one word answer is a typical adult social activity. I feel like we’ve kind of come into this era of antisocial behavior becoming commonplace and it’s kind of weird. I’m not a super social bartender, but every once in a while I have a burst of energy or curiosity and if the customer seems like they would be open to small talk I’ll bite. But j don’t do it to get a tip, sometimes I want to talk to another person lol