As far as I know, Cactus Jack's is the biggest and best in OKC. I haven't been there in a couple years and the last time I went, the retro selection left something to be desired. However, they do have air hockey, Galaga, and Neo Geo. So they have most of what I go to play. The only problem is that the Galaga cab is one of those 20th anniversary combo ones, so the screen & control stick throw me off.
Flack would probably know more about it than I do though. As a matter of fact, he has a section on his website dedicated to the subject:
http://www.robohara.com/?cat=9