You actually have to have 2 licences to pay music. PPL and PRS. The cost is dependent on the size of the salon.
They actually phone you and check and ask what's playing in the background.
I worked from home and bought a license only to find out later you don't need a licence from home and got a refund. I got do fed up with different info from different people. I now use ichill in the salon as we have several treatment rooms and a large reception and only pay plinkety plink music so ichill is perfect and is completely license free.
There are also license free radio stations but they're not my bag. We just have the calm and tranquillity of ichill.
Vic x