An article in the NY Times talking about, you guessed it salsa congresses.
So, it looks like no matter what New Yorkers say about dancing "on 1", now you have heard it; you dance "on 2"
In the United States, there are two styles of salsa dancing: the Los Angeles style known as "on 1" and the New York style, "on 2." This essentially means that West Coast dancers are breaking on the first beat and New Yorkers on the second. A third, Cuban-inflected style, casino, is widely danced in Miami.