I agree with lunch at one and dinner at the other. Sci-fi is a much better lunch/dessert place. But, if you could only do one, I'd go for Sci-fi. At Sci-fi the atmosphere is the show--and it's always great. At 50's Primetime, if you get a poor server it's not fun at all. We went in 2002, and had a great server. It was the DK's favorite meal. In 2004, we had a terrible server (she just didn't get into it), and we all were very disappointed.