I remember passing by this lounge in the concourse F area about 2 wks ago when I was catching my BKK-PNH flight. I recall seeing an AMEX Platinum card logo on the entrance itself??? Just want to confirm that it's enough to show the card and get let in?

I'm going to be catching a BKK-ICN flight tomorrow on TG in J class and I've read good things about this lounge so I wanna check it out.