Hang fabric
You might want to block off a door-less frame without having to install a door. If so, there are many options from which you can choose, and all of them consist of fabric, crochet, or beads. It depends only on your personal taste and your budget.
Hide unseen essentials
You might have a couple of things you haven’t sorted out yet, and you want to keep them away from plain sight. If so, strategically placing a pretty folding screen can save you from a lot of trouble. It’s sneaky but stylish, and it’s effective! Try matching it with a piece of furniture or a work of art, to add more taste.