Originally Posted by
WWads
So assuming that the Amex Centurion card doesn't allow free SkyClub guests, there's how things would work:
ATL:
-SkyClub: He and one child get in free with SkyTeam Elite+ lounge access. His wife gets in free with her Platinum card. He pays $29 for the other child.
-The Club at ATL: They all get in free with the included PriorityPass memberships.
LHR:
-No1 Lounge or Club Aspire Lounge: They all get in free with the included PriorityPass memberships. (No1 Lounge is probably better).
JNB:
-Collection of various PP lounges in the international terminal. Same PP access rules.
Make sure that he registers for PP memberships on both cards. No need to wait for physical cards. He can put the digital membership cards into his iPhone's passbook, or access it directly from the PP app.
All of this presumes that he has set up his PP account and carries his physical or digital PP card. If not, no PP benefits/access. If he doesn't fly often and doesn't make use of this benefit, he might not otherwise know this.