It was a Mill and Mine factory back in the day.
Nice venue. They don't over-sell it even on sold out shows. Reminds me of a highschool gym.
Bar lines could be managed better during a packed house but that's about my only complaint.
AC bought and renovated it a few years ago. It opened during Big Ears a couple years ago.
You might be thinking about the Electric Ballroom / International underneath the interstates. Different venue. Both are good places to see shows.
If you don't find parking out front or a side street, there's big public lots a block behind it under the interstates on Magnolia.