We are twice at 50s Primetime Diner and the food and atmosphere was good both times. We were there in August and March.
I was torn between Sci-Fi and 50's Prime Time, I went with Sci-Fi. I haven't been yet so I can't tell you if it was a good choice. We're also doing the character meal at H&V.
I have eaten at HBBD, 50s and Sci Fi plenty of times. HBBD is more upscale and expensive with a different caliber of offerings but it's not the "only" place to eat. Sci Fi has a great atmosphere and the burgers and shakes are decent. Nothing to rave about but we are talking burgers and shakes. 50s is fine too. I have had their chicken, the pot pie, the roast beef and the stuffed pepper. All were fine but I liked the chicken the best. Two years ago we took my best friend and her husband and did a lot of signature dining and they both thought 50s was the best meal of the trip.
I am huge Brown Derby proponent, but have also eaten at Prime Time and it's not bad for what it is. Have heard the same not so positive things about H&V and Sci Fi as you have. I haven't tried Mama Melrose, but seems to get fairly solid marks. What about trying there?
Sorry to dissapoint, but both those get dreadful reviews.
I know, thanks! H&V we are doing for the characters for my DD and Sci-Fi for the "drive-in" atmosphere. We thought it seemed more fun than 50s.
OR, you could walk or take the boat to the Boardwalk area if you really want something different than MM or HBD. There you could choose from Kouzzina, Brewing Company, Cap May, Yachtsman's Steakhouse, Crew's Cup, etc., etc.