Examples of commercial establishments include all of the following EXCEPT:

Commercial establishments are businesses that are primarily engaged in selling products or services for profit. In the context of hospitality and catering, this typically includes places that serve food and beverages directly to the public.

Restaurants, guest houses, and coffee shops all fit this definition as they operate on a business model aimed at customer service and profitability. These establishments provide meals, beverages, or accommodations, and they generate revenue through their commercial activities.

A school canteen, on the other hand, typically serves meals and snacks primarily to students and staff within an educational environment. While it does provide food service, it often does not function as a typical commercial establishment because it might not operate with the primary goal of making a profit like a restaurant or coffee shop would. Instead, it may prioritize nutritional guidelines and affordability over generating revenue, sometimes being subsidized by the school or government.

Therefore, the school canteen does not align with the characteristics of a traditional commercial establishment, making it the correct choice in this context.