A casting call is a chance for actors to show their best stuff to the directors of a future play, TV show, or movie. It's also a great way for actors to find out more about the character they might be playing. Questions get asked both ways about how they relate to the role.
The audition may take place in a venue like a theater or auditorium. But there's no reason why you can't have a casting call in a smaller space. Casting rooms have a more intimate feel, with a casual atmosphere that fosters discussion, rather than the remote quality a stage audition may create. The casting audition may even be filmed, making certain space amenities very important to have.
Atlanta is a major arts destination in the USA, where filmmakers, script writers, actors, and production staff come to collaborate on all kinds of projects. The venues you can choose from here are second to none; from
live music venues to professional casting rooms, Atlanta has them all.