There is nothing wrong with fun, and if you choose to drink please be a responsible person and find a ride, call a cab, stay the night whatever you can work out to not drink and drive. Warning one drink may be too much as some mixed drinks have twice the legal limit of alcohol in it. Have a plan before you leave the house is best ,but if you give into drinking when you thought not then let people know you drove and you can use some help back home, or a bed, sofa, or floor to sleep on. Triple AAA is offering free rides at a first come first serve basis. If you do not drink maybe you can be the person to take someone home. :)
Do what's right and have a happy and safe New Year!