How to hand out bookmarks?

So, I printed 100 bookmarks advertising my latest book’s Kickstarter to hand out for Halloween. And then, of course, I had exactly 4 families come by… so now I have approximately 96 bookmarks left. I pawned off about half of them on a very outgoing English major friend, so hopefully he’ll be able to find me some prospective readers. But for the other 50-ish… any ideas on places to hand them out? (I didn’t think things through very well, and so the link on the bookmarks goes to my Kickstarter page, not my website’s book page. So… I kind of want them handed out in the next 2-3 weeks while my Kickstarter is running.)

Anyway… any suggestions for places for an introverted and busy author to hand out bookmarks?