I'm not sure in the mid-cities, but I know Maggiano's Italian Restaurant at NorthPark Mall in Dallas, has great event space for a rehearsal dinner and excellent food. Go to www.maggianos.com. They really cater toward group business, unlike other restaurants.
If you want to stay in the mid-cities...go to www.guidelive.com (which has reviews of restaurants in DFW). Click along the left column 'restaurants'. Then scroll down to the 'Find a Restaurant' and use the drop down menus to pick 'type of cuisine', 'neighborhood' and you can see if you can find the restaurant that way.
Good luck.
~H. :)