Nearly 70 single-screen theaters in Bombay went dark Thursday as owners protested against the Maharashtra state government’s new entertainment tax policy that gives multiplexes a three-year tax exemption. Single-screen theaters pay 60% tax.The Theater Owners Assn. and Cinematograph Exhibitors Assn. of India, two major representative bodies of the Bombay film industry, called the government rule discriminatory. Strike is expected to cost screen owners nearly $127,000. The theater owners will discuss the issue with the chief minister of Maharashtra, Vilasrao Deshmukh.