There are lots of great Country Clubs in WGT.
It would be nice if WGT would let you create a custom sorting of the 44,000 plus Country Clubs out there. Unfortunately WGT does not provide anything like that.
However, some information can be gleaned going to WGT Community and selecting Country Clubs.
For example, try sorting on Club Level and leave the box checked that says "looking for members"
The higher level CCs can generally be said to be more active but any CC that is level 10 or higher is probably in that category.
Open any one of them and then sort by the different categories for things that would indicate the membership mix.
1) Tier: (you may or may not want to be in a CC with 80% Legends and only 2 other Tour Pros)
2) Level: (you may or may not want to be in a CC with high level low Tier members who appear to not want to improve)
3) Check the country flags: (you may or may not want to be in a CC with 90% of the members from the other side of the world as you may not have much chance to play a round with them.
4) Date last played: (again you may not want to be in a CC where 50% of the members have not played yet this year)
There are other things you can check if you want but those 4 are a good start. From there you might find 4 or 5 CCs that fit the demographics you desire. Then contact the owners of each and ask whatever questions you think are appropriate.