SWMBO and I met through the Taekwondo school. We kept it low key. My instructor knew we were an item, but nobody else did until we "came out", so to speak, at a regional tournament when she was a green belt. When I took over as the chief instructor, we had a high rank in the area that we would do joint testings with. Whenever it came time to discuss her testing among the judges, I would put my pen down and not score her. I'd answer any questions that they asked about her, but I always took the recommendation from the judging panel as her result. Word got out that that was happening and there has never been a question raised about favoritism or bias. It stayed that way until we both got high enough in rank that we started testing at national events instead of local/regional testings.
She and I now co-own the school. And I must admit - for all that I have gotten from my Taekwondo training, I definitely won the gold medal by having her be part of my life.