TeetJ wrote:

Anywhere in Europe. Desire to fly is bigger than travel inconvenience.

Ok, then I think St. Auban is a good choice, it's *the* glider center of
France. Professional operation, professional instructors, and, should
you want to add some cross country time, very scenic flying in the
French alps. Most important: generally good weather. The village of St.
Auban is nothing worth seeing, but with a car, nice places are in
reachable distance.

Be forwarned that flying at St. Auban is not cheap, but aerobatics is
nowhere cheap. They are usually well booked, so you should contact them
as early as possible.