The Dink Network

It's not widely used, but the people who use it are all over the world and welcoming. There is a system similar to couchsurfing where you can stay with people if you speak it. Using that system, you can travel and stay with people who like to show you around etc.

I don't really speak it yet, though, and haven't used it except with the local Esperanto club people. But I do very much like the idea of equality in a conversation with it.