I like performing this one by Randy Newman. Works well for a nice ragtimey guitar part with alternating bass, especially the chorus. Usually gets a couple of laughs and winces.

Love Story

I like your mother, I like your brother
I like you; you like me too
We'll get a preacher, I'll buy a ring
We'll hire a band, with an accordion
And a violin, and a tenor who can sing

CHORUS: You and me you and me, baby
You and me you and me you and me, baby
You and me you and me you and me, baby
You and me you and me you and me, baby

We'll have a kid, or maybe rent one
He's got to be straight, cause we don't want a bent one
He'll drink his baby brew, from a big brass cup
Someday he may be president..
If things loosen up CHORUS

BRIDGE: I'll take the train into the city
Ev'ry mornin'
You may be plain - I think you're pretty
In the mornin'
And some nights we'll go out dancin'
If I'm not too tired
Some nights we'll sit romancin'
Watching the Late Show by the fire

When our kids are grown
With kids of their own
They'll send us away
To a little home in Florida
We'll play checkers all day
Until we pass away CHORUS

- Merritt