Philadelphia’s first annual National Dance Day is this Saturday, July 31st, and there are a ton of cool dance-loving things going on. Four local dance companies (Philly Dance Fitness, Lindy and Blues, Major Moment Studio, and Messiah Danceworks) will be offering seven FREE dance workshops, from 11:30 a.m. to 9 p.m,  scattered throughout the Graduate Hospital and Rittenhouse Square neighborhoods. There will be everything from blues, cardio bellydance, and hip hop to African jazz, salsa, Zumba-thon, lindy hop, and an end-of-the-night social dance and performance by the pros. (Check out the workshop schedule here.) No dance experience or partner is required. Wear sneakers or dance shoes and bring your friends!