On Halloween in 1976, people attended in costume and talked back to the screen, and by mid-1978, "Rocky Horror" was playing in over 50 locations on Fridays and Saturdays at midnight. Newsletters were published by local performance groups, and fans gathered for "Rocky Horror" conventions. By the end of 1979, there were twice-weekly showings at over 230 theatres. The National Fan Club was established in 1977 and later merged with the International Fan Club. The fan publication "The Transylvanian" printed a number of issues, and a semi-regular poster magazine was published as well as an official magazine.