OK, you're a Yankees' fan. That's allowed in moderation in Oklahoma since the Mick came from there. Look for his statue outside Bricktown Ballpark.
OKC is big on onionburgers. That's probably the area's biggest contribution to cuisine. Check Roadfood.com for specific places. Mostly in El Reno.
The Cattlemen's Steakhouse in the Stockyards DIstrict is a classic, dark-paneled place where cowboys and oilmen "do bidness."
Plenty of other threads featuring OKC.
Someone named "sodagirl" might be interested in the new Pops place (in or near Edmond, I believe) that supposedly sells billions of kinds of soda.
Soadgirl: if burgers are what you crave.. go to RONS hamburger and chili at NW 49th and May avenue in the Mayfair shopping center tucked away in the corner. My personal favorite is the sausage cheesburger.. patty of 1/2 sausage half ground beef too big to eat with your hands.. and if your really hungry.. have the Sausage Chili Cheeseburger.. same as before with chili poored over the top of it BUn and all. the loaded fries are awesome as well. cant go wrong.