Some other chordal variations: In the second line I've used a 2nd fret barred B chord (instead of the F#dim)after the F, occasionally then then moving it up a fret to a barred C and then walking the chord back down to the A7. I'll be interested in trying that F# diminished though - not all that familiar with all the diminished chords but they sure sound good when used in the right place.   Also between the D and G - on the word champagne - I have thrown in a G#7 for effect - there is probably a diminished or some other jazzy chord that fits that spot better but I dont know it.