For one thing, all the photos look the same. There's the picture of the author speaking at the podium. Here's one of Christopher Moore for The Serpent of Venice. Dare I say signed copies available?
This one's Gabrielle Zevin. The pictures are blurrier when I use my cell phone and slightly less blurry when I periodically find my camera. Then I promptly lose it again. This is not that uncommon for booksellers and apparently is a discarded chapter of The Storied Life of A.J. Fikry.
-Noggin, When I Was the Greatest, and The Gospel of Winter, respectively.
It turns out there are four components to a good event: 1) Attendance 2) Sales 3) Media coverage 4) Author Experience. Of course the fifth one is customer experience. That won't determine if you get the next booking, but if you fail that, you won't get the attendance next time, so you won't get the booking after that.
I could probably Photoshop different authors into the photo and you'd never notice. Of course there are sometimes variations. Here's one of Edward Kelsey Moore playing the cello.
Kenilworth Studio 508.