How much time for 50's Diner Lunch?

I have an ADR for 11am and Frozen sing-along FP for 12:30pm show. Is an hour enough time for 50’s lunch or will it be pushing the schedule too much? A lot of reviews for 50’s diner says expect to wait to get seated. Thinking I should cancel the ADR and grab something quick, thoughts?

I have a similar question. I have a reservation for 50’s diner at 7:10 PM, but I also want to see Fantasmic at 9:00 PM. I am doing the fantasmic dining package so I won’t have to line up early to get in. But if I arrive at 50’s at 6:50 PM for my 7:10 reservation do you think I will be seated and done eating by 8:30 PM?

It normally takes us about 90 mins to eat at 50s (including wait time). I’m never a fan of having a tight deadline after a meal as it can make the meal stressful.