I will say that Eggberts probably has the most room for putting tables together. (If we're gonna have a pretty big group). Unless they've changed since I ate there 5yrs ago.
Fun times for me remembering the Gatling gun in the lobby of the Hotel. I go to Claremore for Green Country hamfest occasionally so I did check out the museum last year. I think I read only a small amount of the guns are on display. Unfortunately one of the employees was selling some from storage a few years ago.