The friend of whom I spoke earlier, who was ignored by his 'brothers' when he needed help, once arranged an invitation. Despite the lure of blood-curdling oaths and the odd bit of cold steel, joining the Freemasons didn't seem a very Blacksheep sort of affair.
I'm not really a men-only society chap actually, and much prefer the company of women. (Providing we've been properly introduced of course. I'm no cad!) Each to his own is my motto...