Don't have chords, but here are the lyrics. Taken from this Mancini Website (click)
-Joe Offer-

IT HAD BETTER BE TONIGHT
Music by Henry Mancini
Lyrics by Johnny Mercer

Chorus

Meglio stasera, baby, go go go!
Or as we natives say, fa subito.

If you're ever gonna kiss me
it had better be tonight
while the mandolins are playing
and stars are bright.

If you've anything to tell me
it had better be tonight
or somebody else may tell me
and whisper the words just right.

Meglio stasera, baby, go go go!
Or as we natives say, fa subito.

For this poor Americano
who knows little of your speech
be a nice Italiano
and start to teach.

Show me how in old Milano
lovers hold each other tight
but I warn you sweet paisano,
it had better be tonight.

Meglio stasera, baby, go go go!
Or as we natives say, fa subito