Don’t blame the architect for the inadequate wash room equipment. The owner makes those decisions. Beyond minimum building code requirements, tge licensed architect can only suggest.
No need to suggest that corrupt local officials waive all sorts of building/zoning requirements.
The laundry room there was barely even large enough to hold the four machines, so there is no way there could have been more installed. Of course, it WAS Las Vegas Valley, so who knows how deep the corruption was in 1975? I think Harry Reid was making his bones long about then, so...