For those staying in OKC for the night... Hit up their 'riverwalk'. Go to Red Pin for some drinks, bowling, and sliders. I actually drove there from McKinney once just for the sliders. There is a movie theater next door for those wanting to hit a movie as well.
Just ask for directions to Toby Keith's place once downtown. You can park there for free and walk the 1/8 mile to Red Pin. And after the movie, you've got a place for a night cap before calling it a night.