GregB, let me add that there are places and audiences where I can sing old songs in their original form or close to it and have the audience appreciate the historical perspective.
I frequently sing "Darktown Strutters Ball" by request at retirement communities. It's a very popular song for these folks, including the African-Americans. And it was Jelly Roll Morton's theme song, plus I believe "Darktown" was in his time no more "racist" a term than "Chinatown" was - and is. However, if there are people around who I think may be offended by the term I may pass on the request.   It's not always an easy call.