I also liked The Just City, with reservations; I also felt like it wasn't sure whether it wanted to be a fable/thought experiment or a psychologically realistic novel. Unfortunately, the sequel infuriated me (can tell you briefly why, if you don't mind spoilers); I only finished it as a hate read. I read the third (and final) book because I was hoping that it might redeem the series, but it introduced a number of new, poorly-realized characters and dilemmas, and it was full of red herrings, and it resolved various hanging issues perfunctorily, and it was generally unsatisfying. So I recommend stopping with The Just City. My husband is a big fan of Jo Walton's and also knows her slightly online, so I felt a little obligated to give the last book a fair chance, so to speak.

Theater, music, and swimming sounds gorgeous!