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 has a "W", with Club sign in the corner.
From Clayton Rawson's son, Clayton Rawson, Jr.:
- Every summer from the late 1950's into the mid 1960's, Clayton Rawson, aka The Great Merlini, and his wife Kate invited the Witchdoctors to their home in Mamaroneck New York for a summer picnic. Many of the above named members attended and then performed an evening of magic for the Rawson's neighbors on the stage he had built in the backyard. It had curtains by Mother and spotlights in the trees... In additional to the regular Witchdoctors, others performed as well, including: Milbourne Christopher, Harry Blackstone, Jr., Dai Vernon, the Amazing Randi, Harry Lorayne... I wish I had photos of those shows but i was too busy assisting back stage. Merlini performed many illusions at those shows notably Pepper's Ghost and the Levitation. I was featured in the former, my sisters alternated in the latter.
- For many years, the Rawson backyard was also the site of the annual Mystery Writers of America picnic. Clayton Rawson was a founder of the MWA and the organization's first treasurer. He also coined the MWA's slogan: "Crime doesn't pay... enough".