When we were there (ROM) over New Years we found that one of the clubs allowed us to go in with our WC cards, the one across the hall would not. I don't remember what concourse we were in (we were flying KLM to AMS), but the one that worked was upstairs and on the right at the very beginning of the concourse; the one that didn't work (which I think was Air France) was on the left. I didn't think of using my Skyteam Elite Plus card. I asked to be able to "check out" the denied club. Neither of them were terribly impressive. The one we used was listed on the WC list.