There are several styles of tap dance, including rhythm (jazz), classical, Broadway, and post-modern. Broadway tap often focuses on formations, choreography and generally less complex rhythms; it is widely performed in musical theatre. Rhythm tap focuses on musicality, and practitioners consider themselves to be a part of the jazz tradition and as such, improvisation is essential to their work. Many influential rhythm tap dancers were members of the Hoofers Club. Classical tap has a similarly long tradition which marries European “classical” music with American foot drumming with a wide variation in full-body expression. Post-modern or contemporary tap has emerged over the last three decades to incorporate abstract expression, thematic narrative and technology.