In Chorio there are a couple of supermarkets, one right on the Kali Strata, and one near where the bus turns around.
Also in the square is a kiosk and a card phone.
It is said that some of Symi's best tavernas are to be found up here in Chorio, well worth a visit for the food, the views, and the pleasant relief of no traffic!
At the back of Chorio - near where the bus stops - is a warren of old overgrown alleyways and narrow steps. Well worth exploring, it is like stepping back in time and is really off the beaten track. The old lanes are spanned by buttresses and arches for added stability during earthquakes.
The remains of prehistoric walls, built for protection, can be seen in places, and the ancient acropolis was of course built at the highest point. This was built upon in Byzantine times and became a fortress, to which the Knights of St John, in their turn, added a tower from which they could signal to their primary base in Rhodes. There is still quite a lot of the successive citadels visible.