Sounds fun. It would also have the merit of emphasising two things that tend to get overlooked - firstly, as you say, that it's not just folk music that is affected; and secondly that, as it stands (and will continue to stand after whatever "reform" is carried out) anyone who organises a musical performance in a public place without a Public Entertainment Licence is breaking the law - it's by no means just or even primarily a matter to do with pubs.

So strictly speaking the direct action in this case would be you, rather than the musicians...Still the authorities will probably ignore the law-breaking side of it, to avoid embarassment.