My primary IC's have been PL and WAW.
For WAW it makes no difference as a regular RA nearly always given a 2 cat upgrade which is their Jr Suite (two full rooms) and club access.
At PL Club access is worth quite a lot to some, but not for me as my rate has breakfast and there are far more interesting place to spend your evenings in than a hotel lounge around central London.
I spoke to a GRM at PL recently to see if I would still get the same room upgrades as in the past if I declined club. i.e. trade off Club, get Exec King room instead of Deluxe. The answer was that they can no longer do it by default which was the case previously (my bookings showed London Exec months out) and that 2 cat ug applies with Club.
Call the day before and see how busy they are and it might happen.
The reason is that AMB are doing strict audits to see how RA benefits are applied.
Maybe it will be relaxed down the line. I certainly hope so as I love the Execs overlooking Hyde Park.