It really comes down to what you are looking for in a club.
Smaller club low membership but active players , larger club with 200+ members or a very top of the line club.
If you are an active tournament player , A lot of clubs will be happy to have you.
http://www.wgt.com/clubs/
The link above only shows the top 50 CC on WGT. some clubs have hidden there request to join option as getting requests during shots can course issues for the owners. Click on the club (hit request to join) if you see the button to join.
There are also a large amount of clubs what are not on the list. CC corner in the forums is where owners advertise looking for members can click on there profile & click on there CC & request membership that way. You don`t need to right on owners walls. Try a few clubs out see what you like