Here's another one I ust found in the News Chronicle song book:
WE'RE HERE FOR FUN
to the tune of Auld Lang Syne:
We're here for fun right from the start,
Pray drop your dignity;
Just laugh and sing with all your heart,
And show your loyalty.
All other meetings we've enjoyed,
Let this one be the best,
Join in the songs we sing today,
Be happy with the rest.

I thought that was rather nice! (if maybe a little twee!) I think I might use taht one too!
Lucy