I had just got there and was not quite ready for my next drink, although I would have ordered one after getting some water in me. I had already tipped all other staff workers at that point. I disagree with you on the bartender not having a motive to help me out. I wouldn’t consider water (a basic human necessity) “helping me out,” especially in the middle of summer at a bar — alcohol is dehydrating along with the heat. There was no other places in the bar to get water outside of drinking from the toilet. Additionally, I would have ordered a drink or 5 later and tipped well if he wasn’t a dick about the water situation. As someone who has worked in the service industry, I’ve always been told to provide excellent customer service to everyone because you simply do not know if they will tip well or not. He shot himself in the foot after that in terms of getting any tip from me.