Spotted a few minor differences in the lyrics as well, so before I put the keyboard away again...

AFTER HOURS

1. Going in through the side door,
No need to worry now, the coast is clear.
We can make a little music now, the night is ours,
And it'll sound a lot sweeter after hours.

/Chorus/
After hours, really let your hair down,
After hours when the lights go low,
Forget about your troubles and morning blues,
Put up another round.

2. Paddy, sing a song like a good man,
Sing it in your own way like only you can.
You can give it all your feeling now, the floor is yours,
And it'll sound a lot sweeter after hours.

3. Out in the clear light of dawning,
Street seems so strange in the early morning.
Never heard the birds sing like this before,
And they sound a lot sweeter after hours.