There is a Facebook group where short turn around calls are posted for actors.
The description of the group as posted on Facebook states
“The focus of this group is casting for projects in the CSRA and environs. Please post public casting notices – this can be for film, theatre, videos, or any kind of project, from student to professional. Calls for singers, dancers, writers and crew are also encouraged, as are notices about classes and workshop. However, no promos – no posts about events, completed videos, etc.”