Jack asked for additional variations on a grand square:
1) Do two changes of a grand square and then swing the one you're with (orig.
opposite; heads will now be at sides); repeat to get reunited with partner in
opposite position
2) Diagonal: head gents take corner to center and back, other corners turn to
face each other: from this position, grand square on diagonal. The head gents
and their corners will start by moving forward, the others, who are facing each
other and relatively close, will start by backing away. Repeat for side gents
and their partner.
David Millstone
Lebanon, NH