The influences of jazz and other contemporary styles are present in "Rhapsody in Blue". Ragtime rhythms are abundant, as is the Cuban "clave" rhythm, which doubles as a dance rhythm in the Charleston jazz dance. Gershwin's own intentions were to correct the belief that jazz had to be played strictly in time so that one could dance to it. The rhapsody's tempos vary widely, and there is an almost extreme use of rubato in many places throughout. The clearest influence of jazz is the use of blue notes, and the exploration of their half-step relationship plays a key role in the rhapsody. The use of so-called "vernacular" instruments, such as accordion, banjo, and saxophones in the orchestra, contribute to its jazz or popular style, and the latter two of these instruments have remained part of Grofé's "standard" orchestra scoring.