Not much of it survived but there was a lot of cheap fiction written and published back then. The idea that they sat around reading philosophy, history and what we would consider literature is based on the fact that those were the books that were copied onto parchment. “The Adventures of Zorbator the Great” was not worthy of being copied.
We do have a few of the most popular that survived like "Daphnis and Chloe" but mostly what we have are scraps.
If someone had told me that there were gladiator "trading cards" (without the bubblegum) I'd have said they were crazy, then I read such things actually existed. Human nature doesn't change.