[whoisburbansky]

I don't actually get how "John, to Ringo" translates to LOO, would you mind explaining?

[Edit]: Ah, totally missed the toilet connotation, thanks folks!

[SlickNik]

I suspect - John is slang for the toilet, and Ringo here would be an Englishman - so what would an Englishman call a toilet? A loo. groan

[simondw]

"John" is another word for bathroom. So is "loo", at least in the variety of English that Ringo speaks.

[zem]

specifically, 'john' is american slang for a toilet; the corresponding british slang is 'loo'. 'ringo' is an example of a very well known englishman, so 'to ringo' is an acceptable indicator to clue 'to an englishman'.