Well we know they definetely had theater and plays/drama at least, so there was forms of entertainment that existed even then (besides the references to acting and "bit parts" by Emet and Hythlodaeus, a sidequest in Elpis mentioned a researcher wanting to send a flower he created as a present to his girlfriend back in Amaurot who was a playwright and hoped it would inspire her when writing. There is also a poet found in Elpis at the Mourning Dew who actually recites poetry if you speak to her (for the added kicker she's named Sappho, clearly referencing the real life ancient Greek poet of the same name, some of whose writings were, scandalous at the time due to being um... risque to say the least).

Hythlodaeus was also a bard, and Venat knew dance, so music and dance were also clearly important back then culturally.

And, Altima's seat on the Convocation of Fourteen specifically dealt with the arts, although whether that was acting as a kind of censor/culture police or simply assisting with art's promotion in Ancient society is unclear (it would kind of explain why Altima kind of ended up forgotten among the Ascians after her single appearence back in ARR, her speciality in art wouldn't really be too much help in trying to set up Rejoinings after all ).