Dance Back to Back 11216

1–
: 1c dance BtoB ; turn RH and cast off (2c up) (2,1,3)
9–
: 1c dance BtoB ; turn RH 1½ to the side in 2plx, facing 1cnr (2,1x,3)
17–
: “Pushme-Pullyou Reels”:  1c dance Fig8 on the side round corner positions, starting Rsh to 1cnr **while**{4} 2c facing 3c dance BtoB Rsh on the sides ; repeat figure, 1c Lsh to 2cnr and Lsh BtoB.
25–
: 1c+1cnr turn RH, into DTr position, 1c facing 2cnr and 1cnr | All set as in DTr ; 1c dance R, out between end couple and cast R to (2,1,3)

{{explanation}}
(after second turn, 1c either dance down the middle to 4pl (4c up) on [1–2], or repeat [1–8] with 4c

1-8
: 1s dance DoSiDo, turn RH & cast to 2nd place
9-16
: 1s dance DoSiDo, turn RH 1.1/2 times to end 2nd place opposite sides
  facing 1st corner
17-24
: 1s dance RSh reels of 3 on opposite sides **while** 2s+3s dance DoSiDo
  on sides (pass RSh) & dance DoSiDo on sides (pass LSh)
25-28
: 1s turn 1st corner RH to end BtoB facing opposite sides & all set in
  double triangle position
29-32
: 1L dances up between 2s & casts to 2nd place own side **while** 1M
  dances down between 3s & casts up to 2nd place own side