I think it's a great idea. They used to have "Men's clubs" and bars/pubs that only allowed men back in the 1900's etc, so I think it would be really good to have a place where only women can get away from it all.

Things I would want in there are lots of women's magazines or magazines interesting to women such as gardening and cooking, weight loss, fashion etc.
I'd also want a cafe area for coffee and cakes. Other women might want a stronger drink.

That's just off the top of my head.