Outdoor Curtains. This would be cool for a ceremony/reception space out in a field or something. Put up some posts and connect lines of fabric between them (or maybe ribbon-curtains). A girl can dream.
DIY Outdoor Curtains: Curtain Anchor More
Outdoor living room with rollertube drop shades to enclose the patio. #AwningsOfTulsa
Would work on the back porch. The rustic pipes are a more economical route.