Go read this article about "Movies for Moms" in the Christianity Today movie section.
I think the author does a good job of pointing out some of the drawbacks, but overall it seems like a good idea! We don't have a Loews in our area--or at least one that participates in the program. But you might!
I wish we DID do this @ Loews in FW (not that I could go, I have the other two boys). The ones in Dallas do. Since Loews & AMC have merged maybe AMC will pick up on the idea ??? I have gone to PG movies (like that disney ice skating one) with just my youngest boy before and we had fun - no one else was there so I turned the lights up (yay for booth power!) and let him play in the aisles.