If you are stuck, do not sit and think harder. Change the point of view. Rewrite the scene from the other character's perspective, just for yourself, just to see.
You will immediately find out what the scene is actually about because the other person always knows something your protagonist doesn't. You don't have to use it. You probably won't use it. But you will never be stuck in the same place after you've seen the room from the other side of it.
Technical control over point of view is the absolute game-changer in prose fiction writing; this is the very tiny hill upon which I will clamber, raise my wee flag, and die.
