I agree OP. Its outdated, and if these rules were removed totally, I suspect that in 10 or 20 or 50 years time, people would wonder why they were ever justified. I am sure men and women are capable of sorting out their social arrangements without going to the trouble of banning each other. e.g. women-only swimming sessions - to me pointless and stupid, based on a fear by some women of being seen in a swimsuit by men. But if they are female dominated, what man is going to come along and be tolerated that makes women uncomfortable anyway? Certainly if there was any untoward behaviour, other rules could deal with that. But all this Victorian era getting the vapours because a man might look at you is histrionic and has no place.
Did you read one of the comments - LOL at "the wives" - ban them, the evening spoiling 50% of the population hussies!:
"I was out for a drink with four male friends in my local pub the other night. We were having a wonderful time – plenty of banter and male conviviality. Two of the wives showed up, unexpectedly and joined us. The whole atmosphere changed and, whilst I enjoy the company of the wives, for me at least the evening was spoiled. I had been looking forward to time with my male friends – it was sweet zero to do with lack of equality."