Sacred Hospitality (The Atlas, #0.5)

Hospitium (Greek: ξενία, xenia, προξενία) is the ancient art of hospitality, defined as the sacred right of the guest and the divine duty of the host. For example, it would be indecent for the guest to set fire to the curtains of the host, or for the host to poison the meal of the guest.
Not that anyone abides by ancient traditions.