Philadelphia Science Fiction Society

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Philadelphia Science Fiction Society (PSFS) is a science fiction club in Philadelphia, Pennsylvania. Established in 1936, PSFS is the second oldest extant group in science fiction fandom, and hosted what is considered by some to be the first science fiction convention.^[1] Anyone living in the greater Philadelphia area and interested in science fiction, fantasy, horror, whether written or on TV or in the movies; SF, fantasy, and horror art; gaming, board games or video games; comic books/graphic novels; and related arts is welcome.

The PSFS Constitution requires that a person must have attended three meetings before being voted into membership. The traditional club greeting for a person voted in is, "Pay your dues!" shouted in unison.