(1) Every meeting of a governmental body shall be preceded by public notice as provided in s. 19.84 , and shall be held in open session. At any meeting of a governmental body, all discussion shall be held and all action of any kind, formal or informal, shall be initiated, deliberated upon and acted upon only in open session except as provided in s. 19.85 .(2) During a period of public comment under s. 19.84(2) , a governmental body may discuss any matter raised by the public.1975 c. 426; 1997 a. 123. When a quorum of a governmental body attends the meeting of another governmental body when any one of the members is not also a member of the second body, the gathering is a "meeting," unless the gathering is social or by chance. State ex rel. Badke v. Greendale Village Board, 173 Wis. 2d 553, 494 N.W.2d 408 (1993).