Don't know how big it is. Guess they could tent it outside. Same here about hotels. And that's the grand ballroom in most hotels. I was thinking about the church, too. Except in larger cities, most sanctuaries can't hold that many people at one time - usually why they have more than one service on Sundays. Is Duluth big enough to support a church that size?
http://www.pcbconline.org/templates/aso07bl/default.asp?id=26571
Peachtree Corners Baptist Church
http://www.atlantaathleticclub.org/
Atanta Athletic Club