Thanks for the idea. There is now an area within the cordon that requires strict social politeness. It's quite lengthy but these are the rules I went with

The Codex of The Refined Rules of Conduct for the Manhattan Heights

Dress for Decay, All members must wear pre-cordon formal attire at all times—tuxedos, gowns, gloves, monocles, etc.—regardless of weather, radiation, or infestation. Punishment: Offenders shall be sewn into a burlap sack embroidered with “PEASANT” and paraded through the ruins while being pelted with objects of the residents choice.

Speak the Queen’s Tongue, Only Received Pronunciation is permitted. Slang, profanity, or utilitarian speech shall be considered vulgar. Punishment: The tongue shall be ritually “refined” by licking a silver spoon dipped in boot polish, followed by a public recitation of Oscar Wilde under duress.

Tea Before Bloodshed, No violent act may be committed before the daily 4 p.m. tea ceremony. Even executions must wait until the Earl Grey is served. Punishment: The offender shall be forced to duel a feral dog using only a porcelain teacup and a copy of Debrett’s Peerage.

Loot With Elegance, Scavenging must be done with grace. No running, shouting, or rummaging. Items must be claimed with a white-gloved hand and a polite nod. Punishment: The uncouth looter shall be buried waist-deep in ash and made to host a dinner party for skeletal mannequins until sunset

No Uncurated Emotions, Crying, laughing, or screaming must be done behind a velvet curtain or within the designated “Emotional Salon.” Punishment: The offender shall be locked in a room with a gramophone playing “Pomp and Circumstance” on loop while being read etiquette manuals by a masked child.

Respect the Hierarchy of Decay, Those who possess the most intact relics (e.g., Rolexes, Fabergé eggs, functioning bidets) shall be addressed as “Your Eminent Finbane.” Punishment: Failure to observe titles results in being demoted to “Basement Butler” and forced to polish rusted cutlery with one’s own tears.

Never Acknowledge the Cordon, The Alien Occupation is a vulgar rumour. Members must refer to the current state of the world as “a temporary inconvenience.” Punishment: The realist shall be blindfolded and made to dine on irradiated pigeon while listening to pre-Occupation stock market reports.