The Playford dance would be done to the tune, played as many times as needed, without any words.

Actually the dance is rather odd. It says it is for as many as will but there is hardly time, if you play the music as it would be sung, to do it for 4 couples. More than that you would certainly need to play the B extra times.

A lot of Playford dances come in 3 parts. The A music is standard introduction (leading, siding, or arming) and the B music is either a chorus or 3 different figures.
In this the same figure is done by 1st man, then 1st woman, then 1st man again.
And it has been suggested that they would have got the 1st man to the bottom and repeated the 1st figure for each man etc.

So the tune would be played 3 x the number of couples.
I decided not to bother with it - too many questions.
If you want to reconstruct it yourself click the link I gave, click Browse Index of Titles, then scroll down the D page.