A quick alternative angle to the PP’s response above....in normal CL times, WL is the one/only CL that has offered a CL “add on” option for non-CL reservations. When physically checking in that day you can ask to add CL access - I think the charge is something like $90-$100 a day (it’s been so long I’ve forgotten the specifics, I’m sure someone here will know for sure).
You keep your original room on the non-CL floor, but will have access to the lounge like other CL guests.
It has been said there’s a finite number of guests they can accommodate, but to my knowledge I’ve never seen a report of it not being available. Since it’s not advertised or pushed in any way, knowledge about this is generally limited to those who have read about it on the internet somewhere.
Of course, when/if CL returns, TBD if this same option will be available and at what price.
But historically, some/many on this thread would use this option at times when actual CL room reservations have been hard to find (which isn’t uncommon at WL since the actual CL room count is very small).
Hope that helps!