(c) an indoor sporting event
(d) a boxing or wrestling entertainment

I thought boxing and wrestling were sports?

And also I suppose you could switch a telly on and that'd be ok but you'd have to turn it off when a film came on?

I liked the mention of a piano being an item of entertainment even when no one's playing it! "Let's all stand around the piano and admire it!"

Let's all fight the powers that be! These 'laws', bills whatever they are, are ridiculous. Build a shed and play in that inviting locals for your 'folk event'!