Rent an audition space in Atlanta, GA

Auditions are one of the easiest events to hold. After all, you don't have much decorating to do. It's mostly about having a large, quiet space, with a performance space for the auditioners and where the judges can observe. You do need to pay attention to lighting and sound quality especially if you intend on recording each audition. Otherwise, a school gym, theater, office building room, or library conference room can all work as an audition space to rent.
That said, when searching for an audition space to rent, don't forget about the amenities. Changing rooms are important if you expect actors to get into and out of costumes. Waiting rooms and cast lounges allow attendees to take calls, converse, and relax in comfort without disrupting the auditions on stage. Bathrooms and water fountains are important, as is parking that's free or at least conveniently located close to the audition venue. If parking is a hassle then seek a venue that's close to public transportation stops.

Private audition spaces help keep distractions to a minimum. You won't have people popping in and out or traffic noise in the background. Consider booking a professional concert venue with a stage for your audition. These environments offer excellent sound and lighting control on par with the final performance venue.
Auditions should never be held in your home, however. People expect a neutral location for an audition. Even a basic office or conference room in a community center is better than your living room!

An acting audition space often replicates the feel of a theater as much as possible. A stage or theater where the auditioning actor can showcase their talents in front of a small audience is best. Stages and theaters have acoustic environments that let the judges hear what the actor will likely sound like during the final performance. It's also a good gauge of their stage presence or lack thereof.
Professional theaters and stages are larger venues, however, which means they are pricier to book and may require you to reserve time further in advance. Acting schools, high schools, and university performing halls are worth looking into, however. They offer reduced rates yet still have high quality sound environments and excellent stage lights. These venues should also have microphones, speakers, and other sound equipment, but be sure to inquire beforehand.