Bobbing Joe
for a line of as many couples as will.
Three is as good a number as any, needing fewer repeats as well.
Reconstructed by Master Trahaearn ap Ieuan (in the proceedings of KWDS4)
Music: The required repeat structure is not even - for each of the three parts, it requires AABBAA(BBx((n-1)x3)), where n = number of couples.  This means that for 3 couples, that sub-repeat is 6 times, for 4, it is 9 times.
Needless to say, I don't have any music like that.
Part 1
Verse 1, Part A
1&2: Double forward and back.
Verse 1, Part B
1&2: That again. Face your partner.
Verse 1, Part C
1&2: Set and turn single (left).
Verse 1, Part D
1&2: Set and turn single (right).
Chorus 1, Part A
1: First couple slip down between second couple while second couple is slipping up.
2: Second couple slip down between first couple while first couple is slipping up.
Chorus 1, Part B
1&2: First and second couples take hands around and circle all the way to your places.
(This is the progressive bit - repeat until all have returned to their starting positions)
Chorus 1, Part C
1: Man 1 snap fingers, then man 2 snap fingers.
2: Man 1 and 2 change places to the left.
Chorus 1, Part D
1: Woman 1 snap fingers, then woman 2 snap fingers.
2: Woman 1 and 2 change places to the left.
Note: This change works like a duple-minor change going down and back up the set with actives and passives as couple 1 and 2.  With 3 couples dancing, only one will ever be acting.  With more couples, more sets can be active at once.
Part 2
Verse 2, Part A
1&2: Side left with your partner.
Verse 2, Part B
1&2: Side right with your partner.
Verse 2, Part C
1&2: Set and turn single (left).
Verse 2, Part D
1&2: Set and turn single (right).
Chorus 2, Part A
1&2: Men 1 and 2 take hands, women 1 and 2 take hands, double back and forward.
Chorus 2, Part B
1&2: Couples 1 and 2 cast off from the top and return to place.
(This is the progressive bit - repeat until all have returned to their starting positions)
Chorus 2, Part C
1&2: Couples 1 and 2 do 2 doubles forward to change places with their partner.
Chorus 2, Part D
1&2: Take hands around, 2 doubles to circle halfway around and progress along the set.
Note: Proceed as in part 1.
Part 3
Verse 3, Part A
1&2: Arm left with your partner.
Verse 3, Part B
1&2: Arm right with your partner.
Verse 3, Part C
1&2: Set and turn single (left).
Verse 3, Part D
1&2: Set and turn single (right).
Chorus 3, Part A
1&2: Man 1 and 2 double back and forward (away and toward their partners).
Chorus 3, Part B
1&2: Woman 1 and 2 double back and forward.
(This is the progressive bit - repeat until all have returned to their starting positions)
Chorus 3, Part C
1&2: Men 1 and 2 change places in 2 doubles; women 1 and 2 the same at the same time.
Chorus 3, Part D
1&2: Change with your partner in 2 doubles.  (Hey, I didn't reconstruct this.)
Note: Proceed as in parts 1 and 2.