A majority of the members of Council then in office shall constitute a quorum, but a less number may adjourn any meeting from day to day until a quorum has been secured and may take action to insure the attendance of a quorum. Unless a larger vote is required by this Charter or the general law of the State, Council shall act by a majority of those present, if there is a quorum, but a motion to adjourn or to compel the attendance of absent members may be adopted by a majority of those present at any lawful meeting, despite the absence of a quorum. If a member of Council is personally interested in any matter being considered by Council, he may not vote or participate in the meeting, but he may be counted in determining whether or not there is a quorum present at the meeting.