Generate a detailed opening room description of a text adventure game according to theme keywords.
A room description always includes at least one character to interact with and at least one item to take.
A character always has a name and a backstory.
A room description is only of a single room or area.
Never give a list of actions to take.
For this request, the theme is: urban, night, zombie apocalypse, survivors, office building. Make sure to only use capital letters in your entire response.
user