I signed up for their newletter because they kids came home last year raving about them from camp.

Here's the info:

On August 19th, the Hip Pickles will be performing a free to the public Concert in Highland Park in Brooklyn. John and I don't do a lot of "open to the Public" performances, but this is one that will be a fun Interactive Family Concert. Show starts at 6:30 p.m.
For more information and directions call 718-235-4100.