Prime Time.
My kids thought that they would be watching an actual movie when we visited Sci-Fi. It turned out that they show clips of bad horror movies. The food at the Sci-Fi was bad, no one enjoyed it. This was 5 years ago and we have not returned since. I have heard that this is a great place to visit for a dessert. We might do this next trip.
The PT on the other hand is a must do on every trip. My kids (15,13,10,10) have been enjoying the atmosphere and food at this restaurant for several years. They do watch old tv shows at home like I Love Lucy and Leave it to Beaver. And, they actually enjoy the atmosphere and look forward to interacting with the waitstaff. They also like when we (DH and I) point out different things that we had in our house when we were growing up - like the huge wooden spoon and fork that hangs on the wall LOL.