How old is Frank Sinatra from guys n dolls?

Frank Sinatra was born on December 12, 1915, so if we're talking about the character Nathan Detroit from "Guys and Dolls," he would be the same age as Sinatra. In the original Broadway production in 1950, Sinatra would have been 35 years old, but if we're talking about the character's age in the story, well, he's just as old as the script says he is.