The Landry's chains are pretty decent for the price. Myself, I prefer Joe's Crab shack for decent crab. Salt Grass is decent for steaks.

Another chain I like are the Pappas restaurants, C&H is an awesome steak house where you can dress casual and get fine dining and service. Pappadeux does great cajun dishes and the Tex-mex at Pappasito's is pretty good.

Both places serve good sized portions (well, in Texas they do).

Agree with Bucca di Beppo, those are pretty good when you want a lot of food for a group.