The people in the PHX CRC are really nice. I have used the club several times over the past couple of months flying AA and using my NW WC card to enter. Many DL clubs seem to ask for your boarding pass, agents at this club tend to simply ask where you're flying to. The TSA agents will let anyone through to use the CRC with a boarding pass regardless of which carrier you're flying even though you will need to leave and reclear security.