@bluedoor4
I'm always surprised at the MN line on male/female friendships when married. My DH doesn't go out on his own with other women.. I actually don't know of any of my friends' husbands who do either.
Yep, this ^ in spades. Sure, my DH and all the males I know in relationships/marriage have female pals who they chat to/have banter with, but none of them go out socialising all the time with a specific single woman - on their own, just the 2 of them, with no-one else present.
And I don't know any married man/man in a LTR, who has a close female friend, who he shares secrets with and opens up to emotionally, who his wife doesn't know and has never met.
Weirdly, when these kind of threads come up; you get certain females popping up who have a married man as a BFF, and they almost NEVER know his wife. Often don't want to either. 
I am seeing a kind of 'My best friend's wedding' scenario here, and think it's the OP @operationsunshine who has the problem here. There are a few women like her, who think when a male friend starts a relationship with another woman, that THEY should still take priority over the new woman in his life. And if the new woman gets a bit pissed off with it, she is moany, clingy, insecure, and a nag.
Most women will NOT be happy with their husband or long-term partner being BFFs with another woman, doing stuff that constantly excludes her (his wife/partner,) and where the female 'friend' has no interest in knowing the wife/partner of her male friend. No matter what all the 'cool wives' on here say, most women will not be happy with it.