Some people may believe that Spiritists are only interested in communicating with spirits. A few will focus on this aspect, however the doctrine of Spiritism, that of love, charity, following the golden rule, and the knowledge that we must improve ourselves in successive lives is tantamount to the majority of Spiritist.
Allen Kardec touched on the subject in his The Book on Mediums;
“Intent on the substance rather than the form, and the philosophical aspect of Spiritism being the chief consideration with minds of this character, the phenomena are to them only accessories. They see that, even if the phenomena did not exist, the philosophy would still remain as the sole solution of problems insoluble up to the present time, the most rational theory yet propounded of the past and of the future. The manifestations are invaluable as corroboration and confirmation of this theory but they are not the basis. (Kardec, Book of Mediums, p. 46)
Therefore, if you plan on going to a Spiritist meeting, don’t worry about talking to spirits, the meetings are meant for learning and discussion about Spiritist doctrine. If there is a meeting with a medium present, the date will be told to the people who wish to attend in advance.