Sep. 27, 2024 By Gabriele Holtermann Brooklyn’s latest pickleball indoor facility, PKLYN, is set to open in Gowanus for year-round indoor pickleball fun on Oct. 6. Brooklyn Paper got a sneak preview of the five-court, 18,000-square-foot facility on Sept. 25. Even though pickleball has been around for over five decades — it was invented…