From the website of a Catholic parish that hosts a Men Only monthly meeting on a variety of topics. From their post about how the group got started:
During this time the group was open to all and only two women ever came. We prayed and believed this was God's providence. God was showing us that men needed a group that allowed them to come, talk about the issues that mattered most and share in a common bond of brotherhood rooted Catholicism. Modern society has tried to kill true manhood and we hoped this was one way to help restore it. Of course once we said it was for men only a lot of women said, "Hey we want to come!" Sorry gals too late.