One of the mysteries of the English language finally explained.
1US Chiefly with capital initials. Any of various clubs for boys providing organized activities, often run after school hours by a charitable organization; specifically (US) one founded with the aim of offering a safe environment for the recreational activities of young people, especially vulnerable or deprived children.
2An institution or profession dominated by men (especially affluent white men), and considered to exclude women, ethnic minorities, or those of low social standing.
Mid 19th century. From the genitive plural of boy + club.
Boys' Club/ˈbɔɪz klʌb/
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