block booking

noun2

1. •
   The reservation of a large number of hotel rooms, tickets, or other items at one time; (countable) an instance of this.

   • The restaurant has a block booking for Saturday night.
2. •
   (US, historical) The sale of multiple films by a film studio to a theater as a unit, without the latter knowing much about them, allowing the studio to package less popular films with more popular ones. The Supreme Court of the United States determined the practice to be in violation of antitrust law in 1948.