{{explanation}}
C face C RR, 1c face clw, 2c cclw

1–
: 1c dance between 2c and cast back to places : ½ RHA (slow) (2,1)
9–
: 2c repeat (1,2)
17–
: All A&R to centre ; ½ R&L (2,1)
25–
: ½ LHA (2,1) ; 1c+2c (W leads, M follows) “snake” Rsh round each other to finish BtoB facing next couple.