A lot of people in Danish judo circles know that I'm gay. not a problem.
That said, many others may not have a clue, cos I don't talk about it unless it's relevant in a conversation.
4 or 5 guys from the national team even went with me to a gay bar once
(they said it wasn't fair that we always went to straight bars when going out and they wanted me to pick a gay venue we could go to. They tried to make it as if they did me a favour, but really they were all just dead curious to see the animals at the zoo LOL. I don't go to gay bars often, and I think my straight friends like it more than I do