Buy With Me (a daily deals site akin to Groupon), has a great deal on movie tickets. Right now you can get 4 tickets to any AMC theater in the country for $24. That just $6 per ticket! And the best part is they never expire! I'm going to save mine for the new Harry Potter movie this summer.
click here. If you don't see the AMC deal click on the tab showing your city and then click on "Anywhere USA". It will be in the sidebar to the right of the page. Tickets will be mailed to you in the form of gift vouchers that you can use at the theater box office.