1-8
: All 4 couples in prom hold advance 2 steps to centre & retire, all
  Ladies cast 1 place clockwise
9-16
: All with new partners Adv+Ret, all Men cast 1 place anticlockwise
17-24
: All set to new partners, 1M+3M change places LH (across set), 2M+4M
  change places LH (up/down set) & all set to own partners
25-32
: All circle 8H round & back