3.1 Signs of Intoxication

Reading the Guest Before the Bottle Reads You

The single most-tested skill on every alcohol server certification exam (TIPS, ServSafe Alcohol, TABC, RBS, 360training, and state-specific seller-server programs) is spotting impairment early. Exams frame this around one hard truth: visible signs lag behind blood alcohol concentration (BAC, the percent of alcohol in the bloodstream). Once a guest looks clearly drunk, the alcohol that produced those signs was absorbed 20-45 minutes ago, and more is still entering the bloodstream from the stomach and small intestine.

Your job is not to diagnose a number. It is to detect change against the guest's own baseline and act before service tips them past the point where they can drive, walk, or behave safely.

Physical Signs (what the body does)

Behavioral Signs (what the brain does)

The ABC Method

Exams want a repeatable scan, not a hunch. ABC gives you one in three seconds per guest:

• A - Appearance: Steady or swaying? Eyes focused or glassy? Face its normal color? Did they walk in fine but now lean?
• B - Behavior: Acting differently than at arrival? Louder, sloppier, more aggressive? Struggling with simple tasks like reading a menu?
• C - Communication: Speech clear or slurred? Do they track what you say? Are their answers making sense, or rambling?

No single sign is decisive — a guest may simply be tired, ill, or have a medical condition. Certification exams stress the cluster rule: act on a pattern of two or more signs, or any clear change from baseline.

Stages of Intoxication

Establishing and Tracking a Baseline

The reason ABC works is that intoxication is a comparison, not an absolute. A guest who slurs slightly and laughs loudly may simply talk that way sober. Exams reward servers who note how each guest looks, sounds, and moves at first contact — the greeting, the first order, the walk to the table — and then watch for drift away from that starting point. Practical baseline checks the exams describe:

• Card and cash handling: Can they pull a card from a wallet and read it cleanly? Fumbling later is a coordination flag.
• Menu reading: Do they track a menu or ask you to repeat specials they read a minute ago?
• Gait on arrival vs. trips to the restroom: A steady entrance followed by a wall-touching return is a clear change.
• Conversation thread: Are they still following the table's conversation, or repeating and interrupting?

Write intoxication off as "tired" only when you have a sober baseline to compare to. With walk-in regulars you may know that baseline; with new guests you build it in the first minute.

Pacing

Signs also tell you how fast a guest is nearing the limit, which drives pacing. A guest showing early excited-stage cues after one quick drink is moving too fast; slow the next round and offer water and food. Proactive pacing prevents most cut-offs before they are needed.

Worked Scenario and Common Trap

A guest arrives chatty and ordering normally. Two rounds later he is louder, repeats a story, and grips the bar reaching for his card — that is three signs plus a baseline change, so you stop alcohol service now and switch to water, food, and a ride. Common exam trap: waiting for the guest to "look drunk" (stupor stage). By then he is likely 0.15%+, and in most states you and the establishment are already liable under dram-shop laws, which hold servers and venues responsible for harm caused by an obviously intoxicated patron.

The correct answer is almost always to intervene at the first cluster of behavioral changes, not at obvious physical collapse. A second frequent trap: treating odor of alcohol as proof of impairment — smell only confirms a person drank, never how impaired they are, so always pair it with ABC observations before acting.