2169 Mission is zoned as what San Francisco calls "C-M", or heavy commercial. To quote from the planning department:
These districts provide a limited supply of land for certain heavy commercial uses not permitted in other commercial districts. While the emphasis is upon wholesaling and business services, some light manufacturing and processing are also permitted though limited in most cases to less than an entire building. In recognition of the potential incompatibility of some of these uses and the proximity of these districts to residential and other commercial areas, standards are imposed as to enclosure within buildings and screening of outdoor uses.
Our zoning block is
The planning department seems to have a bad case of the 404s in their links to the third parties who actually host the codes, so you might have to call them directly to obtain more information.
In 2008, San Francisco created the Mission Street Neighborhood Commercial Transit District, and 2169 Mission is within it. Neighborhood Commercial Districts have special regulations which are related to but sometimes independent of the regulations for our C-M zoning.
The building code defines Use and Occupancy Classifications, and their guidelines make it pretty clear we're in Assembly Group A-3, "Assembly uses intended for worship, recreation or amusement and other assembly uses." Note that Assembly Group uses include "awaiting transportation" as an intended occupancy use.
It's unclear what use category our organization falls under.
 Enforcement Procedures
Enforcement procedures involve determining there's a violation:
"Any use, structure, lot, feature or condition in violation of this Code is hereby found and declared to be unlawful and a public nuisance."
However, the administrative enforcement section says:
"If the Department elects to use the administrative remedies of this Section, the Department must use the abatement process set forth in this Section."
and goes on to say that the first thing to do when they're aware of a violation is to post a warning, then issue fines, then get SFPD involved.
 Fire and Safety
SFFD says that to have a permitted fire alarm panel it has to be designed by someone with a PE+EE, architect license, or a class 10 fire permit, and installation must be done by someone with a class 10. If we don't want a permitted panel (and we don't need to be permitted), SFFD isn't involved and has no jurisdiction over our initial installation. However, the ongoing existence of the panel does fall under SFFD authority and is subject to the usual operational regulations.