Most of what you'll find nowadays for "fun" restaurants is a chain. There's not a lot out there that isn't chain nowadays. Crystal's Pizza closed down six years ago. Since you don't want MT, you're looking at either a place not equipped to handle a band, a buffet, or a chain, most likely.
If you're looking for yourself and not your students, there are tons of great places where the fun is however you want to have it. Lots of great food in D/FW.