An applicant or licensee may, within ten (10) days after service of a written notice of denial of a license or suspension or revocation of his license, file a request for a hearing with the city council. The request for a hearing shall be in writing and signed by or on behalf of the applicant or licensee. It need not be verified or follow any particular form. Failure to file such a request for a hearing shall constitute a waiver of the licensee's right to a hearing. (Prior code § 51617)