What guideline must servers follow regarding alcohol service?

Checking IDs to verify age is a fundamental guideline for servers regarding alcohol service. This practice helps ensure that alcoholic beverages are not served to underage individuals, thereby complying with legal regulations and promoting responsible drinking. By verifying a guest's age through a valid form of identification, servers can prevent potential legal issues for themselves and the establishment, making it a crucial responsibility in the hospitality industry.

Other options may not align with the best practices for responsible service. Encouraging guests to drink quickly can lead to overconsumption and associated risks. Serving alcohol without asking questions ignores the importance of monitoring guests for responsible consumption. Limiting service to patrons seated at the bar does not address the broader responsibility to all guests, regardless of where they are seated. Hence, verifying age through ID checks is the most appropriate and responsible guideline for alcohol service.