I am a member of several playing-card societies, and you will find below some comments to the experience I have had with them, together with additional information.
My I.P.C.S. page - about the International Playing-Card Society.
Meine Erfahrungen mit BubeDameKönig -
about the German society.
(This page is in German only, as you should be willing to cope a little with German language if you want to profit from this society.)
I am also a member of the Austro-Hungarian playing-card society Talon. A reason for that is the annual publication, which is called Talon, too.
Playing-Card Societies - a list of more societies in several other countries kept by Daphne Tregear.