I haven't been following the full debate and don't live in the UK any more but just a thought....maybe it's been mentioned before and my apologies if that is the case.

Surely there's a distinction between a "gig" where musicians are paid to provide "entertainment" and a session where normal punters are gathering together in a pub unpaid merely to enjoy their hobby in each others' company. Does that fall under the legal definition of "entertainment"?

mcmoo