What is a common behavior of minors seeking alcohol service?

Minors seeking alcohol service often exhibit the common behavior of one patron ordering drinks for a large group, potentially including minors. This is because minors may feel less intimidated when ordering with a larger group, and may be more confident in their ability to obtain alcohol. The other options are incorrect because ordering non-alcoholic beverages only or paying with cash only do not necessarily indicate that the patron is a minor seeking alcohol service. Additionally, while having identification ready is important for all patrons, it is not a specific behavior exhibited by minors seeking alcohol service.