Separate and go around one
 

The active (named) couple turns away from
each other and walks around 1 person.

If necessary, the inactive couple slides apart
to let the actives in between them.

If the call is "to a line" the movement ends there.

If the call is "into the center", the active couple
continues forward to do the next call and the inactive
couple moves back together.

The active (named) couple turns away from each
other and walks around 2 people, passing by
right shoulders when they meet.

If the call is "to a line" the movement ends as the
 actives join as the ends of the line. Otherwise, the
active couple continues as directed by the caller.