Doesn't this just look like crowds of people jumping up and down going crazy for more? It is very forgiving and doesn't need to be at all symmetrical to look good. In fact, the more variation to the figures, the more fun they look as if they are having. I've done it quite tightly here, with my audience in neat, well behaved rows. It is very easy to open out for a much looser density and is a wonderful motif for awkward spaces.