Although it has not been my normal pattern, in the past 3 months I've stayed at various FS (LAS, PRG, SIN, ATL). When I called the FS LAS yesterday to make a reservation for Thanksgiving weekend they were extremely cordial (as usual) and then asked me if I had been the same 'mauld' who had stayed in PRG, ATL etc. I said yes. She then went on to say, we just want to make sure we have all your stay information in one spot. So apparently, the LAS FS is trying to keep track of FS guests at any of their properties.