A gentlemen's club, or formerly traditional gentlemen's club, is a members-only private club originally set up by and for British upper-class men in the 18th century, and popularised by English upper middle-class men and women in the late 19th century and early 20th century. Today, some clubs are more accommodating about the gender and social status of their members. Many countries outside the United Kingdom have prominent gentlemen's clubs, mostly those associated with the British Empire, in particular, India, Pakistan, and Bangladesh have enthusiastically taken up the practice, and have a thriving club scene.
The original clubs were established in the West End of London. Today, the area of St James's is still sometimes called "clubland". Clubs took over some parts of the role occupied by coffee houses in 18th-century London, and reached the height of their influence in the late 19th century. The first clubs, such as White's, Brooks's and Boodle's, were aristocratic in flavour, and provided an environment for gambling, which was illegal outside of members-only establishments.
The 19th century brought an explosion in the popularity of clubs, particularly around the 1880s. At their height, London had over 400 such establishments. This expansion can be explained in part by the large extensions of the franchise in the Reform Acts of 1832, 1867, and 1885. Each time, hundreds of thousands more men were qualified to vote, and it was common for them to feel that they had been elevated to the status of a gentleman, thus they sought a club. The existing clubs, with strict limits on membership numbers and long waiting lists, were generally wary of such newly enfranchised potential members, and so these people began forming their own clubs. Each of the three great Reform Acts corresponded with a further expansion of clubs, as did a further extension of the franchise in 1918. Many of these new, more "inclusive" clubs proved just as reluctant as their forebears to admit new members when the franchise was further extended.