Over time the show became something of a variety show and the main product became the patent medicines (more about those in another post). They would come to a locale for a few days providing entertainment and "health care" before leaving...either as planned or being chased out.
Here is a clip from a 1932 movie, ffeaturing two legendary performers, Jimmy Durante and George M Cohan (this is the only known film of Cohan performing. If you have seen the Cohan bio-picm "Yankee Doodle Dandy" you will see that James Cagney did study Cohan's style and immitated it well)
PS: The above clip is from The Phantom President (1932)