St. Louis — Planet Fitness has partnered with Poettker Construction on three health fitness clubs located throughout the greater St. Louis area in 2020. Poettker served as the construction manager for the Festus, Washington and Ballwin, Mo., locations, which opened to members in time for the new year. The Festus and Washington locations each feature a new two-story ground-up prototype with a gross floor area of 30,000 square feet, allowing ample space for hundreds of machines and free weights. Construction for the Ballwin location, which opened in late November 2020, …