I'm writing about the volleyball courts on the north side of Tempe Town Lake. The courts are very nice with deep sand that was used across the bridge for the AVP events when the AVP used to come to Tempe. They are free to use and have sprinklers for the summer time when the sand gets hot.
The draw backs are the nets are pretty worn out and there are only portapotties for restrooms. The other problem is that the courts are set up east/west as opposed to north/south so the sun can be brutal depending on the time of the day.
All in all this is a nice facility and you can get pretty competitive games on Saturday mornings.