Low-budge B movie horror double bill ...Planet Doom and  Grindhouse.

The name “grindhouse” or “action house” was provided to American theaters that primarily offered low-budget horror films and adult exploitation style films. Likely named after “grind policy” programming from the 1920s. It's believed that the first use of the term “grindhouse” was established for a theater in 1923

"grind policy", a film-programming strategy dating back to the early 1920s which continuously showed films at cut-rate ticket prices that typically rose over the course of each day.