The first people to find out were the locals in my very supportive LGBT bar (including 3 friends i hadn't seen for a while who were there for their own different reasons)
I let my best friend know when sat in the middle of a heavy metal festival by putting a very black dress on and saying hi to him and 3 other friends we were camping with
Let the wife know (which still hasn't gone down well 2 years later)
last 4 months I seem to have ramped up the number of people mainly my female friends first as they were cottoning on and I wanted someone to go out with this idea did end up with me being in a nightclub on New Years Eve with about 500 people
I was a bit naughty as I like to get them to meet me rather than be told about me it works fairly well but can take a few attempts (which you blame on them for not finding out sooner)
I did have 3 friends find out on my Birthday we decided it would be a good idea to go to a local wine bar (in our school disco uniforms(yes we had been preloading)) I ordered the drinks and as I was turning to pass back to my friend the 3 of them were stood there chatting to her
I'd say about 25 of my friends know now and have all been really supportive
I would classify them as my level 1's friends who would be supportive similar to strangers who have met me as I am
I haven't approached any level 2's on the subject, those that I don't see so much for socialising or that have strong opinions on various subjects and they could go either way
And I don't want to let level 3's find out, family members, work colleagues (male especially), religious moralistic types, school dads quiz team, camra guys, metal heads etc