Great if it's real , but my guess is none of it is , at least not an ongoing 'club' . I think if anything maybe a couple girlfriends decide to try a friendly fight after seeing a female MMA match while drunk and want to try it but only for fun. I doubt there are any women who have real lives, kids , jobs willing to try fist fighting and cat fighting for the hell of it.
There was one club that I do believe existed many years ago. It was started by a woman who founded a site called Women's Combative Web site, a women named Barb. That site reportedly started a safe women's wrestling / catfight club that was very secretive and only opened to women who passed all sorts of screenings, etc. It was so private and selective that what I just said is about as far as anyone would ever get as far as information goes.