Dynamic boxing-inspired, full-body strength and conditioning workouts. SPAR tones muscle and maximizes fat loss through the challenging sport of boxing. ... Locations in Houston, Katy Texas, and Miami Beach, Florida. WORK OUT WITH US GET FIT. BUILD CONFIDENCE. FEEL GREAT. BOOK SPAR 101 New to boxing? We got you. Get stronger in 30 minutes. Come. 9Round Fitness - Miami, FL - SW 8th St. 14612 SW 8TH St. Miami, Florida 33184. Hours of Operation. (786) 699-6140 Schedule Your First Workout.