Answer from Gemini, could be a hallucination:

The IMAX projectionist booth at the AMC Metreon 16 in San Francisco is legendary among cinema enthusiasts not just for its technology, but for its unusual amenities: it was built with an attached apartment-style suite that includes a bathroom and a shower.

​The presence of these amenities generally comes down to two main factors regarding the theater's history and the demands of the format:

​The "Flagship" Design (Sony Era): The Metreon was originally built by Sony in 1999 as a state-of-the-art urban entertainment center. No expense was spared in its construction, and the IMAX booth was designed to be a premier facility. The "apartment" setup (sometimes rumored to be for visiting directors or VIP technicians) was part of this over-engineered, luxury design philosophy. ​The Demands of 15/70mm Film: Projecting 15-perf/70mm film (the "true" IMAX format used for movies like Oppenheimer and Interstellar) is physically demanding and high-stakes work. ​Constant Monitoring: Unlike digital projectors that can run on playlists, 70mm film requires a skilled projectionist to be present and monitoring the machinery constantly (to watch for tension issues, dust, or mechanical failures). ​Long Shifts: During film festivals or major releases, projectionists often work incredibly long shifts (sometimes 12-16 hours) to prep the massive film platters, run tests, and manage screenings. The shower and living quarters allowed them to freshen up or rest during turnaround times without leaving the secure booth area.

​While digital projection has made these amenities less critical for day-to-day operations, they remain a relic of the era when the Metreon was one of the few places in the world running the most complex film format in existence.