There is an Art Theatre in Hobart, IN that charges only $4 for tickets. They only have one showtime of 7:30 pm; and if you present a coupon from nwi.com you can get either a free medium popcorn; free candy; or free small pop with admission purchase. More info here.
There is also a theatre in Hammond, on Kennedy Ave. They have $5 shows and cheap concessions. More info here.
There are other places too here. For Chicagoans and other parts of the country, please let me know what movie theaters by you have deals.