The Traditional Ballad Index comments on this:

Logsdon-WhorehouseBellsWereRinging, pp. 289-290, reports that "Tom Sherman's barroom was a popular cowboy dance hall and bar in Dodge City, Kansas." He cites a claim that this song was written by Francis Henry Maynard in 1876, and claims that Tom Sherman's was the location in this original text. Based on the dates at which the song was collected, this is possible, but I haven't listed Maynard as the author because the evidence is so thin. Logsdon quoted an article in which Maynard allegedly described the circumstances of the composition.