Not at a wedding, but at an engagement party they had hired a guitarist/singer
First song he started off with was that old Paul Kelly classic
"They got married early, never had no money
Then when he got laid off they really hit the skids
He started up his drinking, then they started fighting
He took it pretty badly, she took both the kids
She said: "I'm not standing by, to watch you slowly die
So watch me walking, out the door, out the door, out the door"
She said, "Shove it, Jack, I'm walking out the fcuking door""