(A) Permissive Joinder.
(1) All persons may join in one action as plaintiffs
(a) if they assert a right to relief jointly, severally, or in the alternative, in respect of or arising out of the same transaction, occurrence, or series of transactions or occurrences and if a question of law or fact common to all of the plaintiffs will arise in the action; or
(b) if their presence in the action will promote the convenient administration of justice.
(2) All persons may be joined in one action as defendants
(a) if there is asserted against them jointly, severally, or in the alternative, a right to relief in respect of or arising out of the same transaction, occurrence, or series of transactions or occurrences and if a question of law or fact common to all of the defendants will arise in the action; or
(b) if their presence in the action will promote the convenient administration of justice.
(3) A plaintiff or defendant need not be interested in obtaining or defending against all the relief demanded. Judgment may be rendered for one or more of the parties against one or more of the parties as the rights and liabilities of the parties are determined.
(B) Separate Trials. The court may enter orders to prevent a party from being embarrassed, delayed, or put to expense by the joinder of a person against whom the party asserts no claim and who asserts no claim against the party, and may order separate trials or enter other orders to prevent delay or prejudice.
Mich. R. Civil. Proc. 2.206