My wife is amazing. She can walk into a Wal-Mart, and within minutes some stranger will be telling her their life story. I, on the other hand, suffer from Programmer's Disease. I can walk into a crowded room, approach someone and try to strike up a conversation and have the discussion killed in 3 minutes. I try to improve. I really do. I think it's a gift we're born with.
1. She loves it when I come to save her when the tone of the spontaneous discussion is not to her liking and nothing kills said discussions faster then me participating.
2. When I strike it, my conversations tends to be very subject focused and will leave me and the other person smarter and more informed.
So what I do now is either I stand beside her and try to enjoy the (for me) meaningless chatter (I really like the high pitched voices of socially engaged people), or I will try to find that one other weirdo in the room who holds a ton of knowledge in an area that I'm completely blank about and suck as much as possible information out of them.
That is where my 35 years of continence improvement have led me. YMMV.