According to 247°F, the movie is "based on true events." They must mean that it’s based on people who accidentally lock themselves in a sauna in general, because the characters don’t really come across as real persons.

Take for instance Jenna, who we’re told is "cute ... smart and interesting and fun." These are all Informed Attributes (since Jenna is played by Scout Taylor-Compton, I would dispute the "cute" part as well), as are Informed Abilities Ian’s (Travis Van Winkle) "physics major" and "English degree" and "communications minor."

Ian says he has "always had a fascination with lit... read the rest.