The nurses' station must receive calls from all except?

The nurses' station generally must receive calls from key areas where residents might need assistance, ensuring prompt response to their needs. This includes places where residents spend time or may require support, such as their bedrooms and bathing facilities.

The dining area is typically a social setting where residents are engaged in activities and eating, which usually does not require constant monitoring by the nursing staff via calls. As such, it is less critical for the nurses' station to receive calls specifically from that location compared to more private or sensitive areas like toilets, bedrooms, or bathing facilities, where immediate assistance might be necessary. These areas often require a more vigilant monitoring approach as they could involve safety concerns or personal assistance needs.

Thus, the dining area stands out as the correct answer since it does not necessitate the same level of immediate communication with the nurses' station as the other mentioned areas do.