Nothing is new under the sun, so they say. When I first began singing, in California in the 1950's, there were far fewer female than male performers in the coffee house and cafe scene. It may be that males have a greater need for recognition and applause, I can't say. I have known a number of very talented ladies who achieved some measure of success, but it seemed to be harder for them to get noticed. I remember a lot of crowds seemed made up of couples and single women, with fewer single men. Maybe male singers simply found a more ready audience. In the end, all you can do is level the playing field. Your audiences will tell you what they want.