The Guards' Club, established in 1810, was a London Gentlemen's club for officers of the Guards Division, originally defined by the club as being the Coldstream, Grenadier Guards or Scots Guards, traditionally the most socially elite section of the British Army. Officers of the Welsh and Irish Guards were not able to join until the second half of the 20th century. Its clubhouse at 70 Pall Mall was the first to be built on that street, which later became noted for its high concentration of clubs; earlier clubs had been focused on the adjoining St James's Street.