I came across this article from the Kansas City Times, Kansas City,
Missouri, February 4, 1947:
I can find no reference that Dorsey with Sinatra ever played Hotel
Muehlebach in Kansas City. Here are the only two dates that are documented
for Kansas City when Sinatra was with Dorsey:
October 10, 1940 Pla-Mor Ballroom, Kansas City , Missouri
March 19, 1942 Pla-Mor Ballroom, Kansas City, Missouri
I wonder if the newspaper was thinking of Dorsey on one of these dates at
the Pla-Mor or if there's an undocumented date at the Hotel Muehlebach yet
to be discovered.
Scott