Mystic Players Revival resumes theme nights for their  latest impromptu revue at the library, with this month's edition titled "Comedy Tonight." Bring a comedic monologue, scene, song, poem or whatever with you to perform -- or just sit back and relax in the audience. Mystic Players Revival is a nonprofit organization created by a group of Medford residents who are bringing back a community theatre experience to the city similar to the Mystic Players, who performed from the early 1970s…