Anahata.Thanks for responding to Highlander-as an unqualified funster I was going to bow out.
So then: All UK venues pay PRS (on a sliding scale roughly related to the number of people likely be entertained) if they play music.

This applies even in the unlikely situation where they only put on singer/songwriters.Should such a performer want royalties in addition to their venue fee they would have to join PRS (c.£100)and send them a list of on a standard form confident that eventually they will receive payment.

I'm guessing that such a list would need to include all numbers-self-penned,trad/classical.arr.by self,other writers due for royalties.
In the absence of such a list PRS will apportion payment according to playlists from media sources,who are obliged to provide them as part of their operating conditions.

Incidentally-I don't read H.'s stadium comment literally.Rather a re-statement of the 'big name based on meia plays'situation.
Regards F.(UK)