Mich. Comp. Laws § 37.2302: Public accommodations or services; prohibited practices.

Sec. 302.

Except where permitted by law, a person shall not do any of the following:

(a) Deny an individual the full and equal enjoyment of the goods, services, facilities, privileges, advantages, or accommodations of a place of public accommodation or public service because of religion, race, color, national origin, age, sex, sexual orientation, gender identity or expression, or marital status.

(b) Print, circulate, post, mail, or otherwise cause to be published a statement, advertisement, notice, or sign that indicates that the full and equal enjoyment of the goods, services, facilities, privileges, advantages, or accommodations of a place of public accommodation or public service will be refused, withheld from, or denied an individual because of religion, race, color, national origin, age, sex, sexual orientation, gender identity or expression, or marital status, or that an individual's patronage of or presence at a place of public accommodation is objectionable, unwelcome, unacceptable, or undesirable because of religion, race, color, national origin, age, sex, sexual orientation, gender identity or expression, or marital status.