[krapp]

You don't even need realtime. You can get away with just having people POST to a backend, updating a database and letting people refresh the page.

[evbogue]

Why do all that when you could have the server write simple text files to the disk?

[krapp]

You need interaction for a chatroom, so you at least need a form somewhere.

[evbogue]

This is genius. But can we add an input field for the username?