Mich. Comp. Laws § 37.1303: Exemptions.

Sec. 303.

This article shall not apply to a private club, or other establishment not in fact open to the public, except to the extent that the goods, services, facilities, privileges, advantages, or accommodations of the private club or establishment are made available to the customers or patrons of another establishment that is a place of public accommodation, or if it is licensed, chartered, or certified by the state or any of its political subdivisions.