Whose national anthem was once a drinking song?

A boozy London club's ode to an erotic poet became one of the world's most famous national anthems.

What connects January’s presidential inauguration… to the Baltimore Bridge… to a pub in London’s Strand… to a singsong honouring an ancient Greek erotic poet… and the film Animal House?

You might have guessed. It’s the Star Spangled Banner.

The words are all-American. But the tune comes from a group of hard-drinking London gentlemen who sang to honour an …