Thanks so much for your replies. We're back now, and I did manage to play the digital piano in the music shop near the cinema. Thanks to the Mosaic Restaurant for suggesting that one. Thanks Busybee, I spotted the piano in the piano bar at Hisaranou as we were going past on the Dolmus on the way back from Kayakoy on our last day, so that is definitely one to look out for next time we are over.
SuzzPuss, thanks for the encouragement. We're based in North Wiltshire, and I've played lots of pianos locally. The charity I support is the Williams Syndrome Foundation.
Now I wish I'd made the effort to look on the internet while I was away. .. but it was good to get away form it all for a bit.