Hi guys, I'm flying out tmr and wanted to see which is the best lounge I can pay to enter? As I can see that Cathay requires Cathay boarding pass, I'll be flying Turkish Airlines tomorrow evening.

1. Specifically, I've got the Amex explorer card & see if i pay extra to enter the Centurion lounge?

2. United Club - as I'm travelling Turkish Airlines on star alliance, can I pay to enter? I've already searched & called but they are unclear. And no contact numbers for the lounges at all! Thanks all