I’ve heard that actors like to have props they can handle so they have something physical to do in talky scenes, even if it’s just sipping from a coffee cup. It can definitely be a bit static if characters are just standing and talking. In those kinds of scenes, I like to add some sort of side action if I can, even if it’s never referred to by the characters or has any attention called to it. In this case, Ozomo sliding the food tray under the bars and Azarek eating gave those two a little something extra to do in the scene.