My old D&D group had one folk song, "what would moradin do?" to the tune of "what would Brian Boitano do?" from south park.
I've updated the song for Pathfinder's world, and thought I'd share it with you guys, and I'd love to see other peoples folk songs they can sing with their group.
What would Cayden Cailean do
what would Cayden Cailean do,
if he were here right now?
he'd strike them down and drink a brew
cause that's what Cayden Cailean would do
When Cayden Cailean was in Absalom,
taking that fateful test
He got completely drunk on beer and wine
And still proved he was the best
When Cayden Cailean was in the desert
protecting maidens fair
He lost his sword to a horde of orcs
and had to beat them with a chair
So what would Cayden Cailean do,
if he were here today
he'd probably kick an ass or two
that's what Cayden Cailean'd do.