Noticeable signs of intoxication can be observed in terms of a person's speech, balance, coordination and behaviour.
Speech - Slurring words, talking in rambling or unintelligible sentences, incoherent or muddled in their speech
Balance - unsteady on feet, stumbling or bumping into people or objects, swaying uncontrollably or difficulty standing or walking straight
Coordination - Fumbling to light a cigarette, have difficulty in counting money or paying, spilling or dropping drink, having difficulty in finding one's mouth with a glass or having difficulty in opening or closing doors.
Behaviour - Becoming rude, aggressive, or offensive, unable to concentrate or follow instructions, becoming boisterous or pester others, being overfriendly and making inappropriate sexual advances or being drowsy or sleeping at the bar or table.