It'd be a heavily divided tiny metropolis surrounded by an empty desert. The streets would be filled with communists, socialists, liberals and many others idly believing in the lies these ideas propagate. The city would be filled with sex, violence, murder, drug use and all other accumulated filth of society, with only a small amount of decent people left.
This flimsy city would be held together by a few figures of absolute power, who can order anyone to do whatever they want. Law enforcement would be almost a joke and every liberal alive would constantly complain about there being too much, followed by angry citizens who demand that law enforcement be as tight as possible. There would be little education and even less people interested in it. There would be only a single news outlet and everyone would be rather satisfied with it.
Once in a while, a band of human filth would arrive, only to be thrown out quickly.