This simple and ingenious outdoor room (also designed by Whiteley) uses a frame of pvc pipe set into pvc sleeves pounded into the ground to define a sitting area. The curtain fabric is weather-resistant Sunbrella fabric.
Backyard canopy. Put PVC pipe into a 5-gallon bucket, then pour cement around it. Once dry, put bucket into tall planter, surround bucket w/ gravel, then top w/ soil. (Not covering pipe) Stick bamboo pole into the pipe & hang fabric w/ ties through grommets.