In a bar frequented by working men all week pretty girls get you more customers. Simple business fact.
This is true. I have to admit. Men here tend to frequent bars where they have a crush on the staff. But, this isn't the only thing that should be priority...and maybe it's not for you, but you're givin us this impression.
I didn't think tips were popular in europe. Is Scotland different? From what I understand, Americans were the few that tipped there.