Miss Manners: I can’t focus on my work with colleagues congregating outside my office

DEAR MISS MANNERS: I work for a midsized company that has a centralized administrative office, in addition to locations where we do field work. I am part of the administration, and work permanently from my office.

The unwritten policy is that we leave our office doors open, although we are allowed to close them for short periods if we are on the phone or need to work uninterrupted.

There is a conference room located directly beside my office that is utilized multiple times daily. Before and after these meetings, people will congregate in the hallway in front of my office door to talk. Occasionally someone will even lean on my doorjamb with their backside in my office.

The conversations are loud enough to be disruptive, even if I am wearing headphones, and they are also blocking my exit