If you find a CC that looks interesting to you and you have some specific criteria for what you want from a CC, your best bet is to contact the owner and ask those questions. Any club owner worth their salt will be able to tell you more about the club and whether it fits your requirements, and if you don't get a worthwhile response then that should tell you the club is not for you.
Many CCs have also created their own external websites which tell you about the ethos of the club, give you a look at the kind of competitions they run and give you an overall sense of what the club is about. Some clubs post the address of their websites on their home page,
But there is no way to 'preview' a club in the way you are asking. Looking at a club's recent activity and member list will give you some sense of how active their members are, but you'll get more information by direct contact or looking at their website (if they have one).
Good luck!