Do you keep on avoiding these people and not do what you like? Do you endure being treated as a guy? Do you worry about half a room knowing and the half not? Do you wonder if any of them will have the balls of steel required to date you while knowing that all the other guys think you are a guy?
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1. You do not keep avoiding those people. That to me is running away from what you must face in life. Also see No. 2 below if someone is extremely dense.
2. You do not have to endure being treated as a guy. But, you should be ready for a lot of really slow learners. If someone intentionally disrespects who you are now, tell them to get out of your life, or you just leave them out of it.
3. You do not worry about half the room or the full room. You just do your thing and let your talents, character and personality speak for you. I think that over the long run it would be easier to expect that everyone in the room knows your past history, that way there will never be any surprises.
4. You should not worry about whether they have balls of steel or real flesh and blood. They will date you if they want to. I may be misunderstanding what you have written so far here, but I get a feeling that you want more than just acceptance from your old colleagues and acquaintances. Love doesn't work that way. It is almost just like a woman, extremely fickle when it comes to logic. If it is meant to happen, then it will. You cannot make it happen.
You have come so far and endured so much. However, that doesn't mean all transitioning is over. I think maybe it will be over for you when these issues become non-issues for you. That doesn't mean that everyone will be on their best behavior. To me it means that you don't really care and it doesn't matter anymore to you because you are completely comfortable with yourself being yourself everywhere and can take the worst and the best all in your natural stride. I always say hope for the best while expecting the worst. That may make it easier for you. Good luck.