What is the protocol for serving alcohol at Metro Diner?

The protocol for serving alcohol at Metro Diner emphasizes the importance of verifying a customer's age to ensure responsible service. This is crucial not only for compliance with legal regulations but also to promote a safe and responsible dining environment. By checking identification and confirming that customers are of legal drinking age, the establishment helps to prevent underage drinking and potential legal repercussions.

Additionally, this practice fosters a responsible approach to alcohol service, which is key to maintaining the diner’s reputation and ensuring customer safety. It reflects a commitment to adhering to alcohol service laws, which vary by locality but often require establishments to take proactive steps in confirming ages.

The other options present approaches that compromise legal and safety standards. Serving any customer regardless of age or ignoring local laws can lead to severe legal consequences for the diner, while only serving alcohol upon request does not meet the proactive responsibility required in alcohol service.