We have had several meals at 50's Primetime over the past few years. We started when the kids were about 7-12. They loved the fact that the waiter gave them all nicknames (Skippy,
Scooter, Princess) and that their parents were "yelled at" for putting elbows on the table, not finishing their beans, etc. The adults liked looking at the old kitchen stuff, some of it right out of our Grandma's kitchen!
Fast forward to this past April. The kid's (now 11-17) all put this restaurant down as one of their MUST DO requests. In fact, we ended up eating there twice.
I would advise this restaurant for families who have children from ages 6-14. The kids should be able to take a bit of teasing without being bothered by it. (A survival skill learned early in our family.) The adults need to be willing to play along to make it fun for the kids.
A warning. On our last visit, the table next to ours included a little boy about 4-years old who hardly ate any of his dinner. The waitress "scolded" him pretty severely and he ended up in tears. We all felt the waitress went too far and should have read the warning signs that the kid was not up for this type of treatment. If I were his parent, I would have talked to the manager and left no tip.
In addition to the "show," we have always liked the food at 50's and felt it was a good value for the price.
I hope this helps in your decision!