[2] The organization today has hundreds of members from all over the world, including children, adults who were alive when the books were still being published annually, ardent Baumists, Oz collectors, and those interested primarily in the classic 1939 MGM movie.
The last group met in the banquet hall of a restaurant in Escanaba, Michigan, home of Fred M. Meyer, a founding member who served for decades as the club's secretary.
Meyer also mailed out an annual Christmas card to all members each year, often with ideas for new Oz books, until his health put him at emeritus status that lasted to the end of his life.
As large public Oz festivals grew in popularity, IWOC conventions in the Midwest and East Coast lost much of their support base; fans found the guest speakers attractive and the flexible accommodations more affordable.
[3] Notable members of the Club past and present have included Ray Bradbury, Willard Carroll, Martha Coolidge, Rachel Cosgrove Payes, Martin Gardner, Margaret Hamilton, Michael Patrick Hearn, Eloise Jarvis McGraw, Bronson Pinchot (who organized conventions in the 1970s), Edward Wagenknecht, Eric Shanower, John Fricke, and Meinhardt Raabe.