Smokers are a protected class in DC. Who knew?
Prohibition of employment discrimination on the basis of tobacco use
(a) No person shall refuse to hire or employ any applicant for employment, or discharge or otherwise discriminate against any employee with respect to compensation or any other term, condition, or privilege of employment, on the basis of the use by the applicant or employee of tobacco or tobacco products. Nothing in this section shall be construed as limiting a person from establishing or enforcing workplace smoking restrictions that are required or permitted by this subchapter or other District or federal laws, or in establishing tobacco-use restrictions or prohibitions that constitute bona fide occupational qualifications.