Licenses for any entertainment given for which admission charges
are collected by or for the benefit of any church, school, veterans
organization, or benevolent, charitable or scientific society, fire
company or firemen's or policemen's benefit society or association,
or for any local charity may be required and be granted by the Mayor
in his discretion, but without fee or charge.
If, in the judgment of the Mayor, there is cause for the revocation
of any such license so issued, he may in his discretion revoke the
same immediately or, by written communication to the licensee, fix
the effective date of the revocation. In the event of a revocation
of a license issued for more than one performance, the pro rata amount
of the license fee previously collected shall be returned to the licensee.