There used to be plenty of all female workplaces, the nursing profession, midwifery, teaching in girls' schools, working in parts of the cloth and clothing industry, have you ever heard of a male overlock sempstress? I haven't. Insitutional kitchens, except in male prisons - the list is endless.
In some of them there were objectional women in others there were not.
Men, however, liked to think that the all female place of work was pure hell, because they didn't understand that women talk about other things and make fun of other things than men do.
Most of the "bitchiness" I have encountered has been caused by women feeling that men looked down on them, or kept them back in firms where men and women were supposedly doing the same job (but at two different rates of pay).
The other side of the coin is that the language used in an all male workplace is still offensive to most women of my generation, as was the way the spoke of women. Most of it was just talk, and anyone who like me has worked in a female dominated environment knows very well what we called our DHs and all other men on occasion!
To my mind refusing to employ a well-qualified person just because he is a he, or she is a she, is just as much discrimination as refusing to employ someone because of the colour of their skin, their religious or political convictions, or their sexual preferences.