The St. Mark's Hotel Bathroom Case refers to an incident or case study involving the bathroom facilities at the St. Mark's Hotel. This could be related to design, maintenance, customer service issues, or any other aspect of the bathroom's management within the hotel. Without specific details, it is difficult to provide a detailed response. However, such cases often involve discussions on hotel management practices, guest satisfaction, and the importance of maintaining high standards of cleanliness and comfort in hotel amenities.