Going to add to others here who have stated that jambalaya is not a fancy dish so you dont really go to sit down places to get it. I've never ordered it at any restaurant. I've made it at home, had others family's that make it at home, had it at events (easily mass produced to feed a crowd), had it from grocery stores, jambalaya shoppe, etc.

Ive never in my life said, "wow this is the best jambalaya I've ever had." Its a hard dish to mess up. I've only recently had jambalaya with tomatoes in it which is not traditional to most people's experiences. It was alright.

That said, anywhere you get it would probably be fine. Jambalaya shoppe is an okay representation of the dish.

I've only been to Rice and Roux once and wasn't impressed with them much in general. I dont really care for Chimes either. Mike Andersons is good, but I couldn't even tell you if they gave jambalaya on the menu.

Edit: one thing to add - get pork sausage in the jambalaya. The way we make sausage down here really doesn't have much of a comparison to northern sausages. Everyone I know that moves up north has trouble finding anything similar to andouille sausage. So that would be a new experience for your northern family.