Written by DCist Contributor Meghan Welsh What originally began as a venue to expose the residents of D.C. to traditional and folk dance genres has now become an annual tradition. Today through Sunday, the D.C. Commission on the Arts and Humanities will present the 4th D.C. Dance Festival. Arts enthusiasts and even dance aficionados can find something new to experience at the festival — the three jam-packed days feature over 37 performances and interactive workshops,…