Membership was by invitation only and the sole purpose was lunch. Clayton would call around and tell everyone which New York City restaurant to gather, typically on a Thursday at a Spanish restaurant in back of the Palace Theatre on 49th Street.
Members included: Howie Schwarzman, L. Vosburgh Lyons, Bruce Elliott, Del Cartier, John Scarne, Oscar Weigle, Felix Greenfield, Walter Gibson, Ben Braude, Paul Curry, William Lindsay Gresham, Dai Vernon, John Mulholland, Martin Gardner, Bill Simon, Ira Zweifach, Bill Severn, Richard Himber, Sam Schwartz, and Francis Carlyle.
A genuine Witchdoctors membership card, now considered a collector's item, was printed on a blank-faced playing card containing a cryptic image with "WD"s in the corners.
Edit: The name was "Witchdoctors Club" - without the apostrophe... i have a copy of the by-laws written by Clayton Rawson. The membership card has a W with Club sign in the corner. A card is the collections of magicians Jeff McBride, Alex Stone, and Jen Kramer. I know because i gave the cards to them. Clayton Rawson, Jr. aka Tgmerlini