Every license shall be issued and held subject to all the ordinances and police regulations then existing or afterward adopted, and subject to revocation at the discretion of the City Council at any time on refunding the pro rata share of the license fee for the unexpired term of such license. On conviction of any licensee of a breach of any ordinance of the City regulating the business therein licensed, the City Council may declare such license forfeited without the repayment of any part of the license fee. (1994 Code)