I don't know how to bring it up with neighbors, business partners, friends ... unless someone specifically asks me how things are, it seems weird to say "hey guess what, I'm getting a divorce!" But it also seems weird to not say anything, especially when I know that they are aware my wife has moved out.

Edit: thanks for all the advice and support! Sounds like there's no way to make it not awkward, but also I have been finding that people are pretty understanding and they do like to gossip. I'm not too active on social media so that's not really an option for me, but those who need to know will know.