Final answer:
Beverages should be delivered to guests promptly and a standard expectation could be within five minutes after ordering, based on customer service best practices and the average arrival time of customers.
Step-by-step explanation:
The question pertains to the expected service time in a hospitality or restaurant setting. While there is not a universally mandated service time for delivering beverages to guests after they have been ordered, a standard expectation can be inferred based on customer service best practices and the context provided.
Referring to our examples, if we expect 30 customers per hour, or one customer every two minutes on average, a good service standard for delivering beverages might be within five minutes after ordering.
This allows for prompt service that aligns with the guests' expectations, which is particularly important during peak hours or busy times as hinted by the students looking around for seating and checking their watches indicating a possible high demand period.