According to 247°F, the movie is "based on true events." It seems that’s meant to refer to people generally locking themselves in saunas, because the characters don't feel like real individuals. Take Jenna, for example; we are told she's "cute ... smart and interesting and fun.” These seem like descriptions applied by someone else (since Scout Taylor-Compton plays her, I’d question the “cute” part), as are Ian’s (…