Council shall be presided over at its meetings by the Mayor, or, in his or her absence, by the Recorder, or, in the absence of both the Mayor and the Recorder, by one of its members selected by a majority of the members of Council. A majority of the members of Council shall be necessary to constitute a quorum for the transaction of business. No member of Council shall vote upon any ordinance, order, measure, resolution or proposition, in which he or she may be interested other than as a citizen of such municipality.