The mathematics of it could not be clearer:

Poetry + internet = free beer

The more extended verion of the rules can be found here. You know, I would have done better in school if the arithmatic was that attractive. No, I settled for a middling degree in sventeenth century verse rather than science. Last year, being that clever, I found a number of poetic references to beer and inns and all to prime the pump of your muse. Are there more? How about this one apparently from 1692:

SONG IN PRAISE OF ALE

Submit, bunch of grapes,
To the strong barley ear;
The weak wine no longer
The laurel shall wear.

Sack and all drinks else,
Desist from the strife;
Ale's the only aqua vitae
And liquor of life.

Then come, my boon fellows,
Let's drink it around;
It keeps us from the grave
Though it lays us on ground.

Ale's a physician,
No mountebank bragger;
Can cure the chill ague,
Though it be with the stagger.

Ale's a strong wrestler,
Flings all it hath met;
And makes the ground slippery,
Though it be not wet.

That was in or by the London Chanticleer, 1692 - which sounds like an anthology but I can't really find any decent reference to it. It's reprinted in the anthology A Tankard of Ale, published By Erskine MacDonald, Ltd. London, circa 1919 - the introduction is worth a boo. But its probably just as well that that poet lies in obscurity as any medical man that recommended falling down a lot as a means to keep one's health shouldn't really get that much attention. This one from the same source is interesting for its celebration of staleness:

THE NUT-BROWN ALE

The nut-brown ale, the nut-brown ale,
Puts down all drink when it is stale!
The toast, the nutmeg, and the ginger
Will make a sighing man a singer.

Ale gives a buffet in the head,
But ginger under-props the brain;
When ale would strike a strong man dead
Then nutmeg tempers it again.

The nut-brown ale, the nut-brown ale,
Puts down all drink when it is stale!

That's even earlier - by the known John Marston who lived from 1575-ish to 1634. Seems by later in the 1600s, folk forgot about the properties of nutmeg that would stop someone from having to deal with slippery ground.

Submit!