noun-modifying (irregular), noun
single-theater; independent cinema; art-house film
Used attributively for films shown at a single independent theater rather than a wide release, often implying an art-house or non-mainstream work.
その映画は単館上映から始まった。
The film started with a single-theater release.
単館系の作品は大手チェーンではなかなか観られない。
Art-house films are rarely shown at major chains.