If you're part of a crowd and you're walking through a doorway...keep walking. When you stop to have a conversation, you're creating havoc. Nobody likes havoc. Why would you do this? Just walk another 14 feet and have your conversation there. It's silly to keep people behind you waiting while you talk about how much the world of baseball misses Mark Lemke. We know! Rehashing the same tired sports talk fodder in the doorway is just keeping people from their important endeavors. Why are you keeping people from endeavors!?!?