Originally Posted by
holland
I've yet to see #2 fortunately, but I wouldn't hesitate to interrupt the conversation with a "Hey buddy.... on or off. You're holding up the show!"

You're lucky you haven't encountered this. There is one lady who works in the same building as me who frequently does #2 . I've gotten to the point where if I see her coming I hit the close door button.
She also stands in the parking lot talking to people blocking people from entering/exiting their parking spaces and/or the lot itself while she finishes her conversations.