Final answer:
The decision to stop serving glass mugs at a certain time may vary based on local regulations, policies of the establishment, and considerations for customer safety.
Step-by-step explanation:
The choice to discontinue providing glass mugs at a specific time may differ depending on regional laws, the establishment's policy, and concerns about patron safety. Many facilities that offer alcohol may have policies in place about when to stop serving glassware in order to reduce the risk of inebriated customers.
Usually, this rule is implemented to avoid mishaps, injuries, or improper handling of glasses in the evening when customers could get more inebriated. Businesses must follow all applicable laws and safety regulations.
The management of the establishment can decide the exact cut-off time for serving glass mugs based on local regulations and safety procedures.