First night out at a club in Dublin after my divorce — and a colleague walked in

Ten days ago, my first night out at a club in Dublin after the divorce, in walks the head of finance from my company with his wife. They saw me, I saw them. We all held faces like nothing happened, the three of us, like good Irish people. Im Padraig, 51, divorced eighteen months ago after 26 years married. One woman my entire life until then. After a year of reading forums and overthinking everything, I finally got the nerve to go to a lifestyle club near Smithfield. The night started awkward. I was at the bar nursing a beer when they walked in. Now. We pass each other in the corridor and nod. But I know. He knows. His wife knows. Do I say something quietly, agree it never happened? Or do we all just hold the silence forever? Has anyone been in this and worked it out without it turning the workplace into a slow death?