This is confusing. The code says doors "serving" the Group A occupancy. It doesn't say anything about "egress" or "means of egress" doors. Other sections in the door sections always specify a door that is part of the "means of egress" but not in 1010.1.10. So are the 43 other exit doors in the building serving the lunch room? Are doors to a kitchen or closet in this lunch room "serving" this lunch room?
1010.1.10 Panic and fire exit hardware. Doors serving a
Group H occupancy and doors serving rooms or spaces
with an occupant load of 50 or more in a Group A or E
occupancy shall not be provided with a latch or lock other
than panic hardware or fire exit hardware.
Exceptions:
1. A main exit of a Group A occupancy shall be permitted
to be locking in accordance with Section
1010.1.9.3, Item 2.
2. Doors serving a Group A or E occupancy shall be
permitted to be electromagnetically locked in
accordance with Section 1010.1.9.9.
Electrical rooms with equipment rated 1,200 amperes or
more and over 6 feet (1829 mm) wide, and that contain
overcurrent devices, switching devices or control devices
with exit or exit access doors, shall be equipped with panic
hardware or fire exit hardware. The doors shall swing in
the direction of egress travel.