Isnt there a Freemason sorority?
Then came the 60's and they were forced to disband the all-female group and let the women join the main JayCees group. Then membership collapsed.
So personally I am all for groups segregated by sex, and I can see where Catholic groups can justify maintaining sex-segregated groups.
However, it seems as if this would be something of a contradiction for organizations such as the Freemasons. The JayCees were a business-oriented group. It made sense for it to be all-male when the vast majority of individuals trying to move their way up the corporate ladder were men. However, when women were given equal access to leadership opportunities it made sense for the JayCees to disband the JayCeettes (who were the wives and girlfriends of the JayCees) and encourage women to join the JayCees for career advancement advice and support.
Still this totally destroyed the "boy's club" dynamic of the JayCees and smokers and beer bashes were replaced with board meetings and ice cream socials. It sucked.
I wouldn't wish integration on the Freemasons. It would totally destroy them. However, they need to modify their core beliefs to support more traditional beliefs and stop with all this quasi-Marxist-Jacobin "brotherhood of man" nonsense.