427 W 12th St, Kansas City, Missouri
Supposedly, their headquarters building has an S-scale display layout. I have not been able to find any evidence of that on the Web.
30 Pershing Road, Kansas City, Missouri
(816) 460 - 2020
There is a multi-scale layout which features an S-scale section. There was some remodeling taking place in that area, including on the S-scale layout. S-scale modeler Roy Inman volunteers there from time to time.