I own three film cameras (two pictured here): the Fujifilm Instax Mini 9 Instant Camera, the Pentax K1000, and the Minolta 7000 Maxxum.
I love using the Instax for pop-up photobooths or at the end of family sessions. It is fun to share a quick sneak peek and tangible picture to hang on your fridge or wall.
I mostly shoot with the Minolta and Pentax on vacation or with friends. However, I will bust them out during a portrait session from time to time as well.