It doesn’t do the trick for me either. There are rules in Hollywood. Walking the red carpet together means coming out. But they walked it separately and yet were seen together during the evening. My conclusion is that they were each other’s date that night but they didn’t come out as a couple because they’re not one.
There’s nothing lowkey at the Golden Globes, if you want to hide a relationship, you just don’t go at all. You can’t so subtle at such an event.