It is an all concrete room with small concrete ledges to sit on where you are lumped in with a bunch of other guys who are also waiting to see a judge.
If you happen to be unlucky you may get beaten by hard headed gangsters who are feeling extra macho that day. It often takes forever to be released/processed and is the extremely boring part between either going to jail or being released. It is often a place for intense battles because it is a small concrete room and you can get put in there with anyone including rival gang members and if a fight breaks off it tends to get bloody as there is no where to go.
It is sometimes fun if you get a bunch of guys who like to joke around and do funny shit or if somebody sneaked in some chronic.