PIE*gelの「積み重ねる」「塊を形成する」から。語源的にはclump, globeと同じで、もともとは大きな塊状の物体を意味し、後に短い木の棒を指すようになった。初期のポーカー?スーツが木の棒に似ていたことから名付けられたが、現在では主にフランス語の三つ葉の形で使われ、梅の花と訳されている。後に集団、すなわちクラブに由来する。
We now use the word clubbe for a sodality in a tavern. [John Aubrey, 1659]Club soda is by 1881, originally a proprietary name (Cantrell & Cochrane, Dublin). Club sandwich recorded by 1899, apparently as a type of sandwich served in clubs. Club car is from 1890, American English, originally one well-appointed and reserved for members of a club run by the railway company; later of any railway car fitted with chairs instead of benches, and other amenities (1917). Hence club for "class of fares between first-class and transit" (1978).
Admission to membership of clubs is commonly by ballot. Clubs are now an important feature of social life in all large cities, many of them occupying large buildings containing reading-rooms, libraries, restaurants, etc. [Century Dictionary, 1902]
I got a good mind to join a club and beat you over the head with it. [Rufus T. Firefly]
The club car is one of the most elaborate developments of the entire Commuter idea. It is a comfortable coach, which is rented to a group of responsible men coming either from a single point or a chain of contiguous points. The railroad charges from $250 to $300 a month for the use of this car in addition to the commutation fares, and the "club" arranges dues to cover this cost and the cost of such attendants and supplies as it may elect to place on its roving house. [Edward Hungerford, "The Modern Railroad," 1911]
CLUB, verb (military). -- In manoeuvring troops, so to blunder the word of command that the soldiers get into a position from which they cannot extricate themselves by ordinary tactics. [Farmer & Henley]