A bit far from DXB, but there is plenty of gliding in Israel.
With immigration issues for Gulf residents, Isreal might as well be on another planet.
The closest gliding as another member posted is in Amman, Jordan. A few princes in Saudi Arabia have gotten motor gliders, and I remember reading a few years ago about gliding in Iran and India. None of these places offer easy access to do some nice gliding on the weekend. Best probably to save your cash and do a gliding safari or an intense gliding holiday when you can in Africa, Europe, or America.