"Have you ever read a random book left in a waiting room or on a park bench, etc., and did you like it?"
LEAVE a book — on purpose. Have you ever heard of BookCrossing? Back in 2003, I joined that group of people, who "release" books to other readers, by leaving my first book at Panera in Hixson (a suburb of Chattanooga). Six years later, I was a blogger and wrote about it here. That first book was Three Women by Marge Piercy, published in 1999. Have you read it?