The right and power to organize work gangs or other means of confinement and to confine at labor therein, for a term not exceeding 30 days, persons convicted of violating the ordinances of municipal corporations is conferred on the municipal corporations or their respective authorities. In addition to other punishment allowed by law, municipal corporations, by and through their municipal courts, shall have the right and power to punish persons convicted of violating the ordinances of such municipal corporations by confinement or confinement at labor for a period of time not to exceed 30 days.