Usually called with head ladies "active" (that is, they go to the center first), but can be called with side, all, or NO ladies to
the center. The ladies will progress to their corner, opposite, and left-hand man, in that order and, starting with the
right and will alternate right and left arm turns. The men must  (politely!) accept whichever arm is offered.

Men: if the lady approaches from the center, send her to your right; if she comes from your left, send her to the center.
 

Head ladies active, from a Squared Set:

* Head (active) ladies go to the center and star by the right 3/4 and proceed
to their corner (a side gent) with a left arm turn. They then go directly to
their original opposite for a right arm turn, then into the center for a left
hand star 1 1/4 to their original left hand man for a right arm turn before
going home for a courtesy turn.

* AT THE SAME TIME the side (inactive) ladies start by going directly to
their corners for a right arm turn, then to the center and star left 1 1/4
which takes them to their original opposite.

There they do a right arm turn and go directly to their original left hand
man (at the head) for a left arm turn to send them to the center for a
right hand star 3/4 and home for a courtesy turn.