green door

"Midnight, one more night without sleepin'
Watchin' till the mornin' comes creepin'
Green door, what's that secret you're keepin'

There's an old piano
And they play it hot behind the green door
Don't know what they're doin'
But they laugh a lot behind the green door
Wish they'd let me in
So I could find out what's behind the green door"