As I said, with beginners I would not even attempt any complex dance movement or whole dance without a few 'dancers' to demonstrate. At a ceili or barn dance with paying customers there just isn't time for lengthy explanations. Luckily we usually had a few dancers who followed us around, but for private dances like weddings I would ask the people making the booking if there were likely to be any 'dancers' there, and if not I would keep it quite simple to squares circles and simple longways. Even Waves of Tory would be out.