We all want to enjoy the festivities in the run up to Christmas but office parties are notorious for staff letting down a little too much hair. As an employer, where do you stand if Billy from Accounts has one too many and decides to make an advance while dancing with a colleague? You, as an employer, can be held vicariously liable for discriminatory acts by employees - even if the event is held off site and out of normal working hours. The claim most likely to arise is probably sexual harassment, but employers should not forget that the law now extends to unwanted conduct on the grounds of age, religion and sexual orientation. Employers should ensure that their policy on harassment is up to date, and has been brought to the attention of all employees - a key first step to providing a defence, should the worst happen.