As another poster or two mentioned,PClub members and WC members are able to access any PClub or WC regardless of airline.
I do not know if CRC members have the same rights RE: CRC access.
I think (but could be wrong about this) that PClub members and WC members pay more for our memberships than US members do thus, we should not have to pay for our drinks as it is included in our membership. (We cannot use points to purchase our memberships.)