There will foreseeably be claims of favoritism, or even dating and the office or harassment. Note that you should always have a policy prohibiting and enforcing sexual harassment and discrimination. You have to sasha cohen dating and often describe the conduct you want to prohibit. For style, it may not rival Brad Pitt and Angelina Jolie falling in love on the set of Mr and Mrs Smith, but it's likely to be more glamorous than John Prescott's clinches with his diary secretary Tracey Temple.
You can allow it, but never within the chain of authority. The massive level of damages awarded in US courts is the main reason American employers take a stricter line - their big fear is being dragged into a sexual harassment case after an affair breaks down, particularly one between a senior and junior colleague. Don't date someone much higher up at your company who may at one point have to make direct decisions on things like your salary or employment status. In short, there really are no hard and fast rules when it comes to inter-office relationships, and it could very well depend on the specific workplace you find yourself in.