Jackiest
I avoid women only groups as I find they are often very cliquey and although you can join you will never be friends. Mixed groups tend to be more welcoming and easier to make friends both male and female.
National Women's Register is most certainly not cliquey.
I've made very good friends through the group I attend, near Oxford.
It's definitely the best type of group, mixed or otherwise, that I have ever belonged to.

can be daytime or evening. The two women who started our group were from a larger one in our town a couple of miles away, they were going to just get this one up and running initially but enjoy it so much they're staying with it which is good for us as they have the experience to make it enjoyable as well as suggestions for future events. So far we have a book group up and running, plus several interesting local walks. It's good to meet others who have been in the area a while because they tend to have all sorts of local knowledge which comes in useful. We get quite a few local and church parish magazines that come through the door and they can contain quite a lot about local events/groups/issues so I do look at those. I don't remember getting these local publications frequently when I lived in London.