I would also recommend making sure you maybe have a female or two, maybe not participants, but to be there so the ladies who show don't claim you did anything unsavory to them. Or make the meeting place public, so no one shows up to rob you or worse. Of course, you could always hire some well known cat fighters/wrestlers to start out, put feelers out to ladies you know to make stuff, go to strip clubs and talk to the dances (like Carolina catfights used to), or hit up gyms. It's better to have a female with you or talk to them since a guy looks Pervy at first. Advertisements in newspapers or on college campuses and stuff could work too. Whole broad spectrum of possibilities.