We have a front door and a back door, but everyone uses the back door, and comes through the mudroom into the kitchen. Which is fine by me. I love my mudroom. Most of the year it's the transition from outside to inside, and often lives up to its name. It's also a nice buffer, so all the heat doesn't go right out the door. Most of the year.
Because, you see, I spend 9 or 10 months of the year saying, "Close the doors! I'm not heatin' the mudroom!" Or the driveway.
And about the time they finally listen, and start to close the door after themselves, summer rolls around. So now I'm constantly saying, "Leave that door open and let the breeze blow through!"
And you can guess when they'll get the hang of that... September.