Colorado Athletic Club Monaco. Denver, CO. A Wellbridge Company. Full-time/Part-time. We're looking for a Lifeguard. Who we are. Colorado Athletic Club is Denver’s leading upscale athletic, aquatics, tennis and family fitness club with 7 convenient locations across Colorado’s Front Range. Our club supports the lifestyles of busy professionals, families, health enthusiasts and those who simply strive to be more active by providing a wide spectrum ...