mafalda-api/services/matchmaking/randomFree.js

const io  = require('socket.io')();
const nsp = io.of('/randomFree');

class randomFree {

	constructor() {
		nsp.on('connection', function(socket){
		  console.log('someone connected');
		});
	}

    join(user){
        //join randomFree queue room
    }
}

module.exports = new randomFree();