I was brought up to hold the door for people. It's something that I do, sometimes to the annoyance of the people I'm with if I get to the point when I'm holding the door for a line of strangers. Yesterday, some of us from the office went to have lunch with a former coworker, and the restaurant (Portillo's) had a revolving door. And so I thought:
How would you hold a revolving door for someone?
Would you let someone into one of the chambers and then give it a shove? Or do you stay in one chamber, reducing the efficiency of the door by 1/4, and push the door around for everyone?
As an aside, if you're in the Chicago burbs, Portillo's is a must.