A club is an association of two or more people united by a common interest or goal. A service club, for example, exists for voluntary or charitable activities; there are clubs devoted to hobbies and sports, social activities clubs, political and religious clubs, and so forth. Historically, clubs occurred in all ancient states of which we have detailed knowledge. Once people started living together in larger groups, there was need for people with a common interest to be able to associate despite having no ties of kinship. Organizations of the sort have existed for many years, as evidenced by Ancient Greek clubs and associations in Ancient Rumi. It is uncertain whether the use of the word "club" originated in its meaning of a knot of people, or from the fact that the members _clubbed_ together to pay the expenses of their meetings. The oldest English clubs were merely informal periodic gatherings of friends for the purpose of dining or drinking together.
Contributions by BrainyBabe, Bduke, and MrOllie.