Tony's and 50's
I really don't care for the Plaza menu - too limited and boring. And its decor is "unfriendly" to me. Tony's has been hit or miss for me - I've had some entrees I would rank better than Olive Garden, and some that were just meh. I haven't had a bad meal there, and I think you can fill up teenage boys at Tony's. If you REALLY want to fill them up - drag them to Crystal Palace. I think even teenage boys have a little love for Pooh and friends inside.
For 50's vs. Mama - honestly - either. You can fill up a teenager at either and I like them about the same. But I suggested Tony's which is Italian - so I picked 50's to be a different style of food. Honestly, my first choice here is Sci-Fi - or you might consider Rodeo Round-Up (going for the first time next month myself!), but 50's is good choice, too.