def create_zones(self, add_zones):
        """Create instances of additional zones for the receiver."""
        for zone, zname in add_zones.items():
            # Name either set explicitly or name of Main Zone with suffix
            zonename = "{} {}".format(self._name, zone) if (
                zname is None) else zname
            zone_inst = DenonAVRZones(self, zone, zonename)
            self._zones[zone] = zone_inst
Create instances of additional zones for the receiver.