The Unknown Inn
Interpreters state that whoever sees themselves entering an unknown inn may indicate their death if sick, or travel if healthy, or relocation from one place to another. Exiting one inn to another might signify a sick person being carried or a traveler moving on. If one sees a group descending into or exiting an unknown inn, it may symbolize an epidemic or the dispersal of a group. As for prison, it carries similar interpretations to the bathhouse, and may symbolize illness, hindrance from travel, the grave, or Hell, as it is a place of punishment for criminals.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam