The truth is, they are just lousy shoppers. Women are in charge. They get to pick who they are having sex with, when, and how. Men are just going along for the ride, grateful that they do have a ride. Men don't pick up women at bars.
Women pick up men in bars.
Men with smooth pick up lines just think they are good at it because women let them. That's because women are actually selectively deaf when it comes to listening to men. Actually, counting most major forms of verbal or written communication over the past five million years, approximately never. Anything men say is for other men. That's why a guttural grunt invented sometime soon after the dinosaurs became extinct, still conveys a lot of meaning between two men.