Professional Attitude

Nowadays, my official working hours are from 1500 hrs to 2300 hrs. Working in these hours is not so easy when whole of the office evacuates about 1900 hrs. Some guys are also there beyond the office hours. One can think that its real pleasure to work in the office when there is no much noise. A work can be done and completed in much lesser time which requires a lot of concentration but the situation is really worst than the normal office hours. The people who remain in office with their own will are just there for fun. They enjoy themselves by listening to loud music and some of them are also whistling with loud noise. In such situations, I wish to run away from the office if I can but the problem is I can't leave the office before my schedule time. Such a situation is so embarrassing for me. There should be a professional attitude in professional life. Things that a lot of people used to do in their student life should be away from the office premises.