I can see what Dick Greenhaus is getting at, but the Cap'n is right. If we sing or play in front of others we are performing - even in a situation like a singaround where we are entertaining each other. In a singaround or a similar situation the issue of box office does not come into it.

Even when there is a paying audience, success is not wholly measured by box office, though that is one, important, measure. Another very important measure is whether those who paid enjoyed themselves.