I don't know much about networking...

I've been to ski resorts where there's no phone reception, and I love it that way. No one's on their phones. But it's easy to lose someone for an entire day (or until your agreed meeting time).

Is it possible to use something like this to setup a wireless network which would facilitate chat without a connection to the outside world?

Ok now that I typed it it sounds crazy but I always thought this should be possible