In addition to the general exposure, a company like Citi gets its foot in the door to handle all of the banking for the team and the venue, access to players and their agents and a place to drum up business with other team sponsors in the corporate suites.

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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.

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"I reached back and grabbed the handle for the driver's side rear door, jumped into the car, and put the car into park, " he said.

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