We read:
"The city's 80-year-old cabaret law banning dancing by patrons in ordinary bars and restaurants is legal, the state Supreme Court's Appellate Division ruled Thursday.
The Gotham West Coast Swing Club and several people had sued, saying the law violated their constitutional right to free expression. But the appeals court backed the law...."
Source
But if they had been dancing nude, THAT would have been constitutionally protected, of course.
And isn't it ironic? The same "food police" who outlaw cupcakes for birthday parties in schools, who search children's lunches for "unhealthy food", discourage just what is needed to cure obesity - the exercise of dancing.