I like that many were made into little diners. See the inside of one at the Henry Ford museum http://4.bp.blogspot.com/_i_AovfzNXgQ/TBBzYprDROI/AAAAAAABNIU/02UfHCQAOiQ/s1600/Henry%2520Ford%2520Diner%5B1%5D.jpg it is the nicest I've seen, most are far more simple and less ornamental
Some were made into houses: http://choosingscars.blogspot.com/2009/09/street-cars-getting-second-life-as-home.html
And in San Diego I found one diner street car, and two homes made from street cars http://choosingscars.blogspot.com/2008/06/survivors-of-era-i-doubt-anyone-else.html