The next step, and what At The Door adds to the experience, is the ability for event organizers to handle will-call and on-site ticket sales.

FORBES: Black Eyed Peas Rain Out Can't Shake Eventbrite Confidence

When the ladders were moved into the yard the tray was left on the step of a door at the side of the house.

NEWYORKER: The Woman of the House

Step up your game and check your opinions at the door.

FORBES: Check Your Opinions At The Door

At my firm, we prefer to open the door for our startup clients, then step back to let them directly interface with the journalist.

FORBES: "Never Hire a PR Firm"

The talks stressed that dialogue was the only way forward and that "China would not allow any trouble at its door step".

BBC: Rally in Pyongyang, 29 March 2013

Take your open door one step further, accepting all ideas (even the worst of the bunch) at face value and encouraging team members to share them.

FORBES: Why the Best Leaders Embrace the Worst Ideas