I thought I'd posted this last year, but a thorough search doesn't find it, so I'll try again:
Based (very loosely) on the biblical story of "the widow's mite":

FRED'S MITE
Nigel Parsons 2012
(Tune "Silver Bells" Jay Livingston & Ray Evans)

At the fireplace, Fred is sitting, quietly nursing his beer,
Feeling glad for the warmth and the light.
At the bar are 'City Bankers' freely sharing good cheer,
While poor Fred makes two pints last all night.

   Chorus
   Silver bells, Silver bells.
   It's Christmas time in the city.
   Ting-a-ling, hear them ring.
   Soon it will be Christmas Day.

In the pub now, come the matrons, of the 'War Cry' brigade
Singing car'ls to the sound of their tambourines.
Seek donations, from the patrons, drink a swift lemonade.
Then dispensing God's blessings, and magazines.

Cho:

And they tell all, of the homeless, and the suff'ring about.
And Fred gives them the last of his change.
As they exit, Fred then rises, and he follows them out.
Leaving after one pint seems so strange.

Cho: