Its a game room to play games in.
npm install gameroom
server side:
var GameRoom = require('gameroom')
, app = require('http').createServer(handler)
, app.gameroom = new GameRoom(app);
app.listen(80);
app.gameroom.on('connection', function (socket) {
console.log(socket.id);
});
client side:
<script src="/socket.io/socket.io.js"></script>
<script> var socket = io(); </script>