Comment from The Shambles:-
"Does this rule/law mean two people can perform in a bar/pub at any one time, they finish performing and another 2, or solo, can get up and perform, and then another two etc.

The answer is that will we probably never know - as this question was never actually tested in the courts. When this situation occurs - the law becomes what those empowered to enforce it - say it is - and where they can change what they say it means - to suit themselves."

I seem to hasve read this before -
"When I use a word it means just what I want it to mean - Neither more nor less".   Alice Through the Looking Glass, Lewis Carroll.

Colyn.