OSHA regulates the ratio of employees to toilets ("water closets"). Check this table [1] and file an OSHA complaint [2] if the requirement isn't met.
[1] https://www.osha.gov/pls/oshaweb/owadisp.show_document?p_tab...
A certain online retailer of books and counterfeit electronics has slightly larger bathrooms and a similar layout in its new buildings, but worse gender equality. They may actually be in violation.
(It's not clear the exact algorithm one should use in counting a mixture of multi- and single-person restrooms, but I would presume it's something like, count all the men that can use your male restrooms, count all the women that can use your female restrooms, and take everyone left over and see if they fit is your unisex restrooms.)