Originally Posted by
jimcbob
I agree. I think it is a bad idea. The people who want to pay, say, £30 will be those who think they can get that much value out of the lounge. And they are exactly the sort of people you don't want in the lounge

It's not really a bad idea. Remember that the guests must be guests of a silver/gold. Not a system where anyone can pay for access. Someone must be eligible for lounge access to guest.
The main benefit of such a system would be to eliminate the "discretion" by the lounge agents. You can take one guest free, if you want more, pay for it. Simple and nobody can argue with this.
I agree with
LTN Phobia that the guest cost should be at least £30.