Confront the men in soc.women Group
"I would strictly tell them to leave the group. There is anyway another group called soc.men. They can go there!"
"I would strongly advise them to stand aside and let some room for women if they are interested in the topics discussed in the group. If they did not understand, or if they were there to harass women or impose their own opinions and experiences I would tell them that they are not welcome"
"I would ask why they are in this group. It's one thing to be interested in the topics that are discussed but a different thing to just share their personal male experience. And if they intend to do that they can create their own group"
"I would politely tell them that they shouldn't take so much space in this particular room. "