Notable personal detailsTom Hatten is an Arizona business executive and entrepreneur best known as the founder and CEO of Mountainside Fitness, an Arizona-based fitness club chain he founded in 1991 while attending Arizona State University. He has also been involved in Arizona civic and nonprofit leadership, including serving on the Goldwater Institute’s board. Hatten has been a public-facing figure in statewide business and community philanthropy efforts tied to Mountainside Fitness and other organizations.