The Adventurers' Club of New York was an adventure-oriented private men's club founded in New York City in 1912 by Arthur Sullivant Hoffman, editor of the popular pulp magazine Adventure. There were 34 members at the first meeting. In its second year, "Sinclair Lewis, Hoffman's assistant, was elected secretary and served three years." Monthly dinner meetings, and weekly luncheons, were the primary functions of the club. The club was one of at least two such clubs in New York. The other club was the Ends of the Earth Club, which included Mark Twain as a member.