Sigh. I'm starting to have real doubts about my ability to GM, but I'm willing to give this a go.

New Celestia has been in existence since just after World War I. The gods had been slow to realize it, but as their worshippers dwindled over the centuries and millennia, their powers had withered, too. The city was established so the gods would never be completely forgotten, as well as being a safe place for demigods, who tend to attract dangerous supernatural phenome to them. Demigods get a place to stay, gods get an insurance policy, everyone wins.

A typical first day for a demigod, after they arrive, is to be sent to the Grand Temple. There is usually a demigod of Thoth or another writing/knowledge deity on hand, ready to answer any questions and get their name and ancestry recorded. After this, they get a tour of the city, while suitable accommodations are found. The Council always makes sure to have a bunch of unused but livable houses ready, and all homes are enchanted by the goddess Hestia. If you want to change the décor, you just have to think it.

The city is fully up-to-date with modern technology; in fact, probably a handful of years ahead, thanks to the efforts of Hephaestus, who tends to come by regularly. It might be in the middle of nowhere, but agricultural demigods can easily grow enough food with their powers, and if something goes wrong, the gods themselves have been known to pitch in. Granted, they haven't had any need to since the Dust Bowl, but it's happened before. Water is handled in a similar manner. 

In case of a massive emergency, the traditional meeting place is the entranceway to the Grand Temple, although those in places of large concentrations of people, such as the markets or school, may tend to ask those around them for information. Usually, information gets around very quickly.

That's all I can think of off the top of my head, but I'm probably missing something. Any further ideas are appreciated.