I met my husband at work thirty years ago when I was 19. At the time I was engaged to someone else and I was not interested in Eddie romantically, although I really liked him. I was a department manager in one branch and he was travelling with the sales development team.
My engagement didn't work out and a few years later, Eddie and I met up again and worked on a project together for a whole weekend. I was smitten!
We have been together ever since. We had to keep our romance secret for a while because the company did not like relationships between staff. When we got married, I left the company!
So, I would say this work romance did work out but I thin kthe secrecy and naughtiness of it all help it to thrive because we didn't have workplace colleagues poking their noses in and stirring things up.
At my workplace there are loads of relationships that are supposed to be secret but are well known. In one case, a couple, both married to other people, have been having an affair for 28 years and they seriously think that nobody knows! Large academic organisations are full of such things.