code: function( roomID, key, value ) {
  
  		if( roomData[ roomID ] === undefined )
  			roomData[ roomID ] = {};
  
  		roomData[ roomID ][ key ] = value;
  
  		return promise.resolve( value );
  	}
docs: set a variable on the rooms data object
  
  @param {String} roomID id for the room whose
  @param {String} key variable name/key that you want to set
  @param {*} value Value you'd like to set for the variable
  @return {Promise} once this promise succeeds the rooms variable will be set