We parked across the street from it, it was a meter to take money for your parking and you just put the ticket on the dashboard.
There are also always people "organizing" parking in the street for the concerts. With a ticket and everything
There is also street parking that's metered. I know on Sunday's they do not charge making it free. Not sure what day your concert is on.
They have a parking garage attached to their building. I recommend using it because it is reasonably priced and saves you the worry and hassle of external parking or metered parking. That being said, I'm sure you could find something else, not sure if the price will be much different though.
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