{{explanation}}
Couple face couple, at random throughout the room.

1–
: NHJ with P advance to opposite couple | change to NHJ with opposite and retire sideways ; Turn opposite RH.
9–
: NHJ with opposite advance towards P | change to NHJ with P and retire to place ; Turn P LH.
17–
: L-Chain
25–
: With P promenade at will, to face a new couple.