Free music's in the air

Get your outdoor dance on this weekend for the low price of ... nothing!

Today: Coney Island's SirenFest; Central Park SummerStage presents Q-Tip and Chester French

Tomorrow: Central Park SummerStage presents Alpha Blondy and Lee "Scratch" Perry; Dirty Projectors, Magnolia Electric Co. and Crystal Antlers at East River State Park a.k.a the new JellyNYC parties