Witness Theater is a completely student-driven company of actors, writers, directors, and producers at Johns Hopkins. Everything that is performed either at the Arellano Theater or the Mattin Blackbox Theater is written by a student. This makes for a mixed bag of performances, but I've been satisfied with almost every show I've seen. Often, they'll have one-acts in the early fall to showcase new writing talent. Tickets are usually really inexpensive.