Looks like the demo hasn't been update to use io.engine.clientsCount https://github.com/socketio/socket.io/blob/master/examples/chat/index.js https://github.co

Looks like the demo hasn't been update to use io.engine.clientsCount https://github.com/socketio/socket.io/blob/master/examples/chat/index.js https://github.com/socketio/socket.io/blob/master/examples/c... Maybe make a pull request?