Talking of which, you'd have to be desperate for a pint to take up this offer:
This is JD's blog about language use, journalism, and media old and new.
I once worked as a barman and this lad ordered a pint of "numbers" with a male colleague of mine. The barman who was working with me didn't respond to this chap's request. The customer, thinking he had a cool way of ordering his preferred tipple, said: "Haven't you heard of a pint numbers before, pal, what sort of barman are you?" The barman replied: "Yes I have, but we sell 80 Bob as well." Needless to say, the smile was wiped right off his face.

Supermarket Asda has been accused of encouraging underage binge-drinking by selling four cans of lager for 90p.
Its packs of Skol, each containing 440ml of alcohol, work out at just 51p a litre.
In London the average price of a pint – at £4.06 – is dearer than a hit of heroin