All the time, mostly about ba<x>seball.
Whenever I pay them. If I pay by the drink, each drink, if I run a tab, when I pay the tab.
Never. I live in the UK, and I'm tight with my money.
Only when they're smaller than me. I've got a bad back and if they're too large it hurts to much.
When they give me free drinks.
When I'm finished at the bar