The Open Space Alliance for North Brooklyn, which will have a big role in the future of North Brooklyn’s Parks, including McCarren Park and Pool, will be having a fundraiser at McCarren Pool on September 15. (The group is involved in the McCarren Pool survey that’s currently online.) In any case, Jelly NYC, which produces the Sunday shows at the Pool is putting on the benefit show, which will feature GZA performing Liquid Swords, plus Jamie Lidell. Tickets are $19, you can get them at Other Music or Turntable Lab or at (sigh) Ticketmaster.