I lived in Tulsa many years ago, went to T.U. in the '70s. Cain's would be an awesome place to see Webb!
http://en.wikipedia.org/wiki/Cain's_Ballroom
http://www.cainsballroom.com/ 
I saw a lot of great music there...Asleep at the Wheel, JJ Cale, Commander Cody, Vassar Clements, Hot Tuna, Talking Heads and many others. Missed the Sex Pistols, although some of my friends were there. They left early.
Now we live in St. Louis, so we have been at several shows with Karen!