I was at a gathering of singers in Scotland last year- one singer started that fine old traditional song 'Twa Recruiting Sergeants' - this was accompanied by actions from the listeners to suit the words e.g.

'Over the mountains & over the main' was accompanied by pointing both arms Upwards to a point (mountains) and a level waving motion with both arms (the main) & so on!

It maybe wouldn't be appropriate to do this for many songs, but this is a pretty cheerful song- there was no coercion, it was all spontaneous and great fun