Line up the drinks

A bloke goes into a pub, takes a seat at the bar, and orders five pots. The barman gives him an odd look since the bloke's all by himself, but he serves up the five pots and lines them up on the bar.The bloke downs them....One, Two, Three, Four, Five. He finishes the last one and calls to the barman, "Four pots, please, mate!"The barman serves up four pots and lines them on the bar. The bloke downs them....One, Two, Three, Four. Then he belches loudly, sways slightly on the stool, and orders three more pots. And one after the other, he knocks them back....One, Two, Three."Two potsh, mate!" he calls, and the barman places two pots in front of him. Down they go....One, Two. As the bloke slams the last one down on the bar, he says, "One pot, mate." So the barman fills the glass.The bloke sits there, staring at it for a moment, trying to focus. Then he looks at the barman and says, "Y'know, it'sh a funny t'ing, but the less I drink, the drunker I get..."