What is the primary question asked when verifying a guest's age?

When verifying a guest's age, the most direct method is to inquire about their age by asking "How old are you?" This question explicitly seeks the information needed to determine if the guest meets the age requirements for certain services, such as alcohol consumption or entry into age-restricted areas. It encourages a straightforward response that allows the server to quickly assess whether the guest is of legal age.

While asking for ID is a common practice and provides definitive proof of age, it does not directly engage the guest in the verification process. Similarly, asking for their birth date can also confirm their age; however, it may take longer for the guest to recall and provide that information. The question about whether it's their first visit is unrelated to age verification and would not serve the purpose of confirming if the guest meets the required age threshold. Thus, asking "How old are you?" directly addresses the core need for age verification.