How bookclubs work really depends on how well you know everyone and the tone and type of books you're reading; sometimes it's meant to be a serious environment for people to discuss themes and literary topics, and sometimes it's a place to just make friends and laugh. For example, I'm in a book club but it's really casual because it's just my friends and all we do is read bad, smutty, or bad AND smutty books lol. For us we just read out particularly bad or funny lines and laugh.