Where are some of the best places for New York style pizza in New York City?
Stromboli, off 14th Street on University place, near NYU.
The best place to dance salsa in New York City?
Look into "Fuerza Bruta" in Union Square.
Where is Nickelodeon's Worldwide Day of Play 2010 in New York City taking place?
Apparently, it is going to be at Riverside Park at 72nd. The park stretches up to 158th street though, so check around if they aren't right at 72nd. I hope it helps.