In reply to fred99:
I've got a few friends in the Pinnacle Club and was also invited to their Annual Dinner as a guest this year on behalf of my local mountaineering club. I'm a young bloke and have only ever been encouraged by Pinnacle Club members when I have been on the crag with them and have not seen a single hint of anger toward/ hatred of men (as a group) from any member (I have seen certain members express displeasure with certain men behaving in an unpleasant manner but that was due to substandard behaviour by the individual men involved). They were really very hospitable toward me at the dinner in fact. This is contrasted to a joint meet I ran with a male only mountaineering club a couple of years ago where I heard a variety of misogynistic remarks which were neither funny nor necessary.
Climbing and Mountaineering have historically been pretty male dominated activities, the Pinnacle Club and the Ladies Scottish Climbing Club both serve to provide a mutually supportive and encouraging environment for women to be able to get involved in Mountaineering with their peers. Even in local clubs with a decent balance of genders (the Oread is roughly a third female as a rough guess) you do still occasionally get meets where there is a single woman or only men on a meet (not because anyone has been discouraged, just the way things pan out occasionally). Men on the other hand will pretty much always be able to find a bloke to climb with in any club which they are a member of.
The history of the Pinnacle Club is also a significant part of the history of female Mountaineers/ Climbers within the UK and if the club (of around 200 members) does not have the funds or expertise to record that history it could well be lost permanently.
The big national clubs like the SMC, the CC and the FRCC etc have much bigger membership bases (and presumably cash reserves) available to draw on for experience and funds for a project like this, however they don't have as much work to do anyway as the history of men's mountaineering is quite well documented so they would instead be focusing on the history of their members.
TLR The Pinnacle Club has a purpose to help people enjoy the mountains and they don't harm anyone else. Mens only mountaineering clubs provide a place where weird misogynistic views persist and don't serve any purpose which could not be served by a club accepting Men/ Women/ whatever else people identify as.