I've always taken the little openings people naturally give in conversation to let them know in a natural and subtle way. For example if people are sharing what they did over the weekend it is typical they'll mention their date, bf, gf, wife, husband, etc. I do the exact same thing. Nearly every mundane conversation presents an opportunity to share that info in a naturally and unassuming way. After coming out to all my close friends and family, I've never really had to "come out" officially to any one else. Once at my new job a coworker and I were talking about a movie and he asked if my wife liked it. I just simply said "no wife here, but my partner really liked it. He got very apologetic, and I told him it was no big deal. I told him I look at it as though I was just correcting him on the pronunciation of my name. Just live openly and authentically most people respond in kind, if they don't it is not your job to make them understand or carry the burden of their ignorance. Hope this helps.