Hare's a song about all this. "A licence to sing"

And in case the blue clicky doesn't work, here is the first verse and chorus:

Well I went into a public house, and ordered up my Sbeer,
and the barman says, I'm sorry mate, you cannot sing in here.
A fellow from the council, he came on very strong,
says I haven't got the licence that will let you sing your songs.
So sing a song of freedom, sing it while you may,
rules and regulations are taking it away
So sing a song of freedom, better sing it very quiet,
If anyone joins the chorus, then a licence is required.