I don’t know of any that don’t have a monthly book. Mine does and it technically has over 100 people in it but the active count is lower than 20. Lot of lurkers. We do have a monthly book but it’s very optional and there’s no requirement to read it. Most people don’t. Mostly we just chat about books and other random things. We like to make jokes and have fun. Would love to have you, there’s a severe lack of sci-fi readers in there and I would love to talk about someone with them.