In 17-32, the corners traditionally set one bar to the person you just passed, then one bar to the next person to pass. In a variant for [19-24] 1c turns BH in PdB.
Unofficial: On 2nd turn, 4c has an easier start if 1c+3c+4c dance a 3c Poussette
5c (dancing couple) stands facing 1c in centre of square set, numbered clw as usual.
after 5 times through, 5c finish in the middle, all other C have moved one place clw