AOPA does a lot, but I left because I found I personally was doing little other than reading the magazine. Ditto the LAA, or PFA as it was then. I've got a lot out of the BWPA in terms of networking, job advice, social activity and so on, and yes they do accept men (not just 'token' men); all you have to do is send in your sub.
But that's just my twopennorth, and probably everyone is different. However, in my experience the more you put in the more you'll get out, so it's not worth joining any unless you're prepared to go to meetings, maybe get on the committee, and so on.