For those of you in open relationships, who do you decide who to tell?

I am living in a pretty new place, and trying to make new friends. I want to know that the friends I make will be accepting of me for me, regardless of my lifestyle. I usually tell people pretty early on that my husband and I have an open relationship, and I am finding that it makes some women uncomfortable with me around their husbands (which they should not be).

So how do you decide who to tell, and when to tell them? Or do you only share this with people who are in the lifestyle?