(1.) Rationality in Homo sapiens makes them social. And, man is a social animal. Desires in the sub-conscious mind find conscious manifestation in formation of Associations. A 'Club is essentially an association of individuals. In order to have relaxation, refreshment and recreation, such individuals with the common idea and sometimes, motive form such associations, known as clubs.
(2.) Clubs are of many varieties; there are Registered Clubs and Proprietary Clubs, Works Social Clubs, Working Men's Clubs, College Clubs, Church Clubs, Political Clubs and others.
(3.) Generally speaking, such clubs are controlled and run by certain sets of rules of conduct as voluntarily invented by its members. To ensure smooth and proper functioning, every club forms its own Constitution which is, thus, collection of rules and agreements governing day to day existence. Such Constitution generally contains appropriate Rules governing Membership, Meetings, Voting Rights and so on and so forth.