I was working as manager in a pub down in London years ago when Alan Ball walks in( when he was at Southampton.
So I goes over to him all dead polite like " good afternoon Sir ,Can I help you?"
He orders his drink ( can't remember what it was)
I look him straight in the eye. " I'm very sorry Sir but I can't serve you and am going to have to ask you to leave"
He gets all narky, his voice goes up a few octaves more, " Why, Why? What have I done?" " you can't refuse to serve me"
" Listen pall, there's no way I'm serving any blue noses, me auld fella'd never forgive me" and walked away with him squeeking something about bloody Liverpool supporters
Made my day anyway