Here's the original:

GREEN DOOR
(Marvin Moore & Bob Davie)

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.

Knocked once, tried to tell them I'd been there.
Door slammed. Hospitality's thin there.
Wonder just what's goin' on in there.

Saw an eyeball peepin' through a smoky cloud behind the green door.
When I said "Joe sent me," someone laughed out loud behind the green door.
All I want to do is join the happy crowd behind the green door.

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

[Recorded by Jim Lowe, 1956.]