We simply used github for the page you are looking at. And that's also how you can add
your city or even contribute site fixes for this site.
Just follow these steps and you get on to this page here:
Get a room, some food and a projector in there. Tell the people and off you go.
Read the long version about how to host,
which we wrote after up the first JS CodeRetreat with some real
If you need some help on hosting there are some really good info at hosting
If you have specific question you can also post here or simply tweet something to @jsCodeRetreat.