Md. Code, Criminal Law § 13–2202

To benefit charity in the county or to further the purposes of an organization qualified to conduct bingo under this section, an organization may conduct bingo if the organization is a bona fide:

(1) religious organization;

(2) fraternal organization;

(3) war veterans’ organization;

(4) charitable organization; or

(5) volunteer fire company operating in a community that does not have a paid fire department.