I have a 500 member club with a similar issue -
Most of the activity that goes into the club is from the members in the club, if you have a lot of inactive members in a club, then the club will not remain active (which is part of the reason why my club is inactive.) You need active members who are actively participating in events along with admins who are making forums to keep the club active.
Somethings that I have noticed that clubs with a lot of members have is -
Daily puzzles, would you rathers, daily tournaments, vote chess, matches, fun types of tournaments (example: logo competition), membership events, daily puzzles, etc.
Good luck on your club!
I have a club Knight Forks Club. I started September 20 and now have 109 members. I work hard on the club make lots of events and games but I feel like I have to work to get each member. How could I get more people to join without me working so hard to get them?