An empty keg is often the best indicator sign of a terrific party. 

That is why there are few things that are as sad as a half-full keg on a Sunday morning. 

The half-full keg reminds you that your old volleyball pals have moved away, that Alex and Sarah aren't drinking anymore and that you wasted good money on too much beer. You'll have to pump and dump the leftovers down the kitchen sink, or return the keg half-full to BevMo and suffer employee stares as they realize you have more money than friends. 

Instead of treating this awkward leftover as a millstone of failure, perhaps it could be converted to a bounty of cheap beer.

As luck would have it, Sue had just given me some beer-making supplies, including empty 22 oz. beer bottles, bottlecaps and a bottlecapper. Could I re-package the beer, allowing it to live for another Saturday?

Yes! I could! 

In an effort to diffuse the foam before the beer went into the bottles, I tried decanting the beer into a pitcher first.

If I had been trying to obtain as much beer foam as possible. This would have been considered a total success.