The term "grindhouse" used to refer to a particular style of movie theater that was once common in places like Hollywood Boulevard and Times Square. As far back as the 1920s, these theaters would adhere to a "grind policy" of showing low-budget movies at cut-rate ticket prices, often in a double or triple feature format. The theaters were usually located in the rough parts of a given city, which gave them a reputation: these were bad places that screened cheap, terrible films, which naturally gave them their own sort of charm. In 1968, the old Hays Code was replaced by...