CLUB = 31F lounge access.

From past posts, they are creating a new category of rooms like Club King, Club Twin, etc. These rooms include access to the 31F lounge, and will be a new higher category.

What's confusing is that previous posts said only Diamonds booking Exec will receive 31F access. It seems that both Gold and Diamonds will receive Club when they book Exec.

If you book anything below Exec, even as Diamond or Gold, you will only get access to 4F.