Selling and Serving Alcohol Responsibly
Core concepts
Responsible service rests on three ideas: the server controls how much alcohol reaches the guest, when it stops, and under what conditions it is consumed. Understand standard drink equivalents (a 12 oz regular beer, 5 oz wine, and 1.5 oz distilled spirits are roughly comparable in alcohol content), because pacing judgments depend on counting drinks, not on how many glasses a guest has held. Learn the difference between service policies (house rules such as last-call times, drink limits, food requirements) and legal duties (statutory prohibitions on serving minors or visibly intoxicated persons). House policy can be stricter than the law but never looser.
Also master the mechanics that slow intoxication: food in the stomach, water and non-alcoholic alternatives, measured pours instead of free-pouring, avoiding doubles and layered or "flaming" drinks served to guests who are already impaired, and refusing rapid rounds for one person. Know your role in checking age at the point of sale and in monitoring a guest across the whole visit, not just at the first order.
Traps
Questions love to blur "legal minimum" with "good practice." Serving an obviously intoxicated adult is unlawful in most jurisdictions; serving a guest who has had three drinks but shows no impairment is generally lawful but may violate house policy. Another trap: assuming a guest who switches to water is safe to keep serving alcohol later, or that a large meal cancels the effects of alcohol. It does not; it only slows absorption. Watch for scenarios where the guest is not the purchaser (a friend buys a round for someone already cut off).
Rule of thumb
Count drinks, not glasses, and treat the guest's behavior as the deciding evidence. If you would hesitate to let that person drive, stop serving alcohol and offer food, water, and a safe ride.