What five details let the reader assume Mr. Calloway and his band members were very successful in "Bud, Not Buddy"? Chapter 13 through 16
There are several details that lead the reader to assume that Mr. Calloway and his band are very successful. First of all, they can afford to eat at the Sweet Pea, the "best restaurant in Grand Rapids" (Ch. 13). Also, they eat there so regularly, and are so well known, that there is a table reserved just for the band, even though there are a number of other people waiting to eat (Ch. 14). A third detail that evidences the success of the band is the fact that being able to be included in it is enviable and competitive. Thug, who is trying to "stay in this band longer than the last three drummers did", calls the slot "the best drumming gig in the state" (Ch. 13).
The fourth and fifth details that point to the success of the band have to do with the material things the members are privileged to have. When Bud meets Miss Thomas and shakes her hand, he immediately notices that "there were about nine diamond rings on just her right hand" (Ch. 14). Also, Herman Calloway himself is apparently the owner of a very spacious dwelling, the "Grand Calloway Station", a house with two stories, several rooms, and people going "in and out...at...many hours of the day and night" (Ch. 15).
A final indication of the band's prosperity is that, even during the Great Depression, it has a schedule that is "pretty heavy for the next couple of months" (Ch. 16). Clearly, Herman Calloway's band is doing very well!