Roy,
Oh man, lots of great places within walking distance or short cab ride of your hotel and HOB's.
Steaks- Ruth's Chris, Chicago Chop House, Gene & Georgetti's (I'd probably go with Ruth's Chris, but they're all good)
Specialty places - Maggiano's (Italian, huge portions & great food), Fogo de Chao (Brazilian all you can eat..waiters walk around to tables with skewered meat and serve you right at your table - pricey), Cheesecake Factory (I've never been there, but my wife visits almost every time she's downtown Chicago...very good food and reputation).
Seafood - Shaw's Crab House and Joe's Seafood & Steak
These are all probably on the pricey side, but Maggiano's and Cheesecake factory won't require taking out a second mortgage. The steak houses will be expensive, but they are all top rate.
I'm figuring since "the one who must be obeyed" likes seafood, and you and the kids like steak, Joe's might be a good choice and is appropriately named, too!
I assume most of these places have websites where you can check out menu's and pricing. I'll let you know if anyplace else comes to mind.
"Rock ON & Keep the Faith"