Distribute a memo before the party reminding employees that appropriate workplace conduct standards will be maintained at all times. Employees are to act responsibly, and excessive drinking or other inappropriate behavior could result in disciplinary action or dismissal. In addition, confirm that attendance at the social event is voluntary.

Use professional bartenders when serving alcohol. Instead of having an open bar, provide ‘‘ticket bars’’ where employees are given coupons, and establish a drink limit per individual. Instruct managers and supervisors that they are not to buy drinks for their employees under any circumstances.

Collect employees’ car keys at the beginning of the party, and stop serving alcohol early. Distribute car keys at the end of the party after you’ve ensured that employees or their family members are sober. (This could be seen as draconian, so discuss this as part of your celebration planning.)

Offer a wide variety of nonalcoholic beverages, and offer protein- rich foods that slow the body’s absorption of alcohol.

Instruct volunteer spotters and designated drivers to monitor the party and, if necessary, to drive intoxicated employees home.

Arrange for taxis or other public transportation, or book a block of rooms in a convenient hotel for anyone whose functioning may be impaired by alcohol.

Taken From : The Hiring and Firing Quention and Answer Book