What kind of food are you looking for and what price range? If you want a good steak and atmosphere, try The Buckhorn Exchange. Pricey but worth it.http://buckhornexchange.com/index.php
Lots of eating establishments and bars in Lodo around Coors Field. If you like baseball, take a tour of Coors field. You can also tour the Coors Brewery in Golden, about 20 minutes west of downtown Denver. Both the boat show and RV show are in Denver this weekend as well.
Just a few ideas, let me know if you need more!