ACE-certified personal trainer Oscar Sajche makes working out a dance party during Zumba classes at Discovery Green, offered every Wednesday this summer. Zumba classes are part of Fitness in the Park, a free fitness series at Discovery Green presented by Sprouts Farmers Market. No pre-registration required, but participants must sign a waiver upon arrival. Bring a towel and water. Wednesdays, July 4–August 29, 6–7 p.m.