Check out this video from Kelly Loudenberg, who says:

"Metropolis in Motion is holding a 24-hour Dance Marathon and Party to bring attention to the NY State Court appeal case regarding Cabaret Laws that restrict social dancing. Dance groups of various styles have been filling 90 minute timeslots since yesterday and through the night at 23rd Street and Fifth Avenue. There will be a party/rally on this morning following the Marathon from noon-2pm in Madison Square Park."

Go to Metropolis in Motion for more information.