It must be Harry Bauer's Airport Club Lounge that the OP refers to.
At least it has air conditioning!
Here is a picture:
View attachment 31531
Harry Bauer Club Lounge, Port Vila Bauerfield International (VLI) - BusinessClass.se
The link says access is for "business class and status passengers" and "a hand written invitation is given out at check-in". The reviewer actually liked the lounge!