The St James's Club was a London gentlemen's club which operated between 1857 and 1978. It was founded by two leading diplomats and its members continued to be largely diplomats and authors. It was first established in Bennet Street, and after a brief spell in Mayfair, moved to 106 Piccadilly by 1868. In the final quarter of the twentieth century many gentlemen’s clubs of London suffered from declining membership, and in 1978 the St James's Club merged with Brooks's Club and vacated its premises.