I don't know if this will necessarily increase attendance at the event, but it hopefully will at least get the word out that there is a haiku community in Southern California.
I actually visited 14 libraries, but the Institute of Architects Award-winning Cerritos Library turned out to be an unfriendly place and I didn't leave anything there. The library was beautiful, shining in its recognition of being the first titanium-clad structure in the United States, but the warm friendly, if slightly frumpy in some cases, librarians in the other libraries were replaced with youngish, slender, attractive and "cool" people, who when asked if I could leave my flyers, seemingly turned up their noses at the mere thought of flyers cluttering their library. I was told that I needed to go to city hall to ask permission and it was highly unlikely that permission would be granted for anything that wasn't city sponsored, and even if it was, I couldn't leave flyers, I would then be able to post a high-quality poster in a specific location.
Fortunately, for my own sanity, the librarian at the next library I visited, the George Nye Jr. Library in Lakewood, was simply wonderful and very helpful. It wasn't all shiny and sleek like the library in Cerritos, but it was a comfortable, community oriented library, which made it a better place in my mind.