One might find a partial answer to that question here: https://www2.erie.gov/health/index.php?q=it-mandatory-public-restaurant-have-dedicated-employee-restrooms-or-family-restroom Specifically: "[The NYS Sanitary Code (14-1) for food service establishments] further requires that when the facility has a seating capacity of 20 patrons or more, that bathroom facilities must be provided for patrons." Some codes vary by location (such as municipality); it might be a good idea to look online for NYS building code enforcement, and such for the specific locale about where one is enquiring.
I don't remember asking that
No unless food is served
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