If you are good with animals, volunteer at a place like the Potter league. If you have other interests, look for places where you can meet people with similar interests. I guess it depends where you are but most places have some kind of meetups and groups. Doesn’t need to be a bar. See if any authors are reading in town or near by and read the book and go to the reading. Often people mingle after and you’ll have something to talk about if you like the book.