A few suggestions:
check your members....are they playing other types of games (your CC only shows last round played---as in stroke play). If they are playing other types of games, they are still active...get some more members and then start setting up events. If they aren't playing WGT at all, no point having them in your CC.
play some blitz's or alt shots and select Am, Pro or Tour Pro tiers...often, these are the newer players and may be interested in joining a CC. You have a good recruiting base from those games.
Ask if they are members of a CC...don't poach from other CC's
Most importantly have CC matches, tournaments and lot's of communication....that's what kills most of them...lack of a reason to be a member.
Go into the WGT Community link and find some big CCs and then find the owner and drop him/her a wall post asking for some suggestions on organising events...how they stay engaged, etc.
Here's an idea...not sure if anyone is using it...Have a "Beat the Tour Legend/Legend event"...Invite a quality player to set a score (closet to the hole, stroke play round, blitz score, etc) and have your members try and beat it or come close...winner gets a sleeve or two.....or. maybe winner gets some one on one advice during a round with that same Tour Legend/Legend.... things like that will keep it fun and active.