>> you can find more of those soap
posters here.
>> all posters thanks to Hundland Poster Image ArchiveFight Club: Production Art
Fight Club used a very distinct, and let's say weird, advertising campaign that perfectly fits the style for the movie. For examples, just check out the official (American) webpage for the movie (here). This page shows other production art from the film - for more, go to my link page where you can find some fan-pages that have great archives for all kind of Fight-Club-pictures, including production art.
>> you can find more of those soap
posters here.
>> all posters thanks to Hundland Poster Image Archive