Based on WoH T&C, that statement may be true. In practice, some Hyatt properties with clubs or lounges will place Explorists (who are using Club access certs) in rooms on Club Floors in order to grant club access. That scenario has happened to me a couple of times. I have not yet experienced a Hyatt with lounges placing me on a non-Club floor when using an Explorist upgrade cert for club/lounge access. If anyone has used an Explorist Club upgrade cert while booking a standard room, and has not been placed on a Club Floor, it would be great to know which properties do this. Because of the way the rules are written, Hyatt properties could scale up or back the way they handle this. YMMV