DON'T join the Real Fight Club.
I do have an interest to declare as i work with Cityboxer but i expect guys like KO Artist will know all about the history of the guy who runs it - Alan Lacey. Try finding someone with a good word to say about him. I joined there at first but got wise there are dozens of others who also made the same move from RFC to CB.
Amateurs will probably not be allowed to compete outside of exhibitions but they'd be welcome to train and help train others - at Cityboxer anyway.
I joined as a white collar boxer coming up for 2 years ago now and enjoy training regularly and sparring. I'll get around to having another bout by the summer too.
All the matchmaking is done inside the gym so that fights are fair & competive based on weight, fitness & ability.
http://www.cityboxer.com was updated recently, take a look. You can pm me if you have any ?'s