Watch: Community partnership brings first outdoor aqua Zumba classes to Cool Waters this summerCommunity partnership brings first outdoor aqua Zumba classes to Cool WatersKristen Schmalfeldt, program manager at the West Allis-West Milwaukee Recreation and Community Services Department, said the collaboration was inspired by her organization's director. We have Crystal this morning and Dina at night, and it's just really great opportunity to have out at Cool Waters. Cool Waters is one of five outdoor pools Milwaukee County operates this summer. Krystal Ganz, aquatic manager at Milwaukee County Parks, said the pool's layout made it a natural fit for the new program. Cool Waters will remain open through Labor Day.