英文翻译，不要谷歌或百度翻译出来的

No Office Eating Policy

Be mindful that all foods must be eaten at the cafeteria or designated communal areas in the office. First of all, eating at the desk may cause distraction to your fellow co-workers. Also, when you mix eating with working, it reduces your work efficiency and productivity. Other than being unsanitary, it looks unprofessional and unorganized from the perspective of a client or visitor.
As educated office workers, we should be aware of the basic office etiquette. Please observe the no-office-eating policy, as it is a courtesy to others as well as a benefit to you.

这不是直译，但是比较地道的说法。