Mich. Comp. Laws § 90.11

Sec. 11. In prosecutions for violations of the ordinances of the city, either party may require a trial by jury. The jury, except when other provision is made, shall consist of 6 persons. In suits commenced by warrant, the jury shall be selected and summoned as in misdemeanor cases in the district court. In civil actions to recover penalties for the city ordinance violation, the jury shall be selected and summoned as in other civil actions in the district court. An inhabitant of the city shall not be incompetent to serve as a juror in any cause in which the city is a party or is interested due solely to the interest in the outcome of the action which the person may have in common with the other inhabitants of the city.