This would be great for a driveway wedding celebration- DIY Pergola Retractable roof shade Slide the roof closed to create a shady retreat; open it to let in the sun or gaze at the stars.
could make a great privacy screen if you made it into a wall
Pergola- collapsable shade- cant decide if I want that or not. side of house doesnt get full sun for long - Gardening Life
Various Pergola Roof Ideas Make Homes Fantastic Pergola Gazebos (shared via SlingPic)
I think these shade screens/privacy screens are really cool when done right.