How about a room divider screen? They make some in wicker that look very nice and they are bi-fold, so you can angle them in different ways.
How Can I Provide More Privacy Between Master Bedroom And Master Bath? There's No Door!
Have you considered having a door installed? Even a temporary door or temporary wall may make a great difference. Fold out dividers still make great partial walls and can also make an attractive home décor piece. You could also try hanging some decorative chains or beads in the doorway to create a barrier.