Anytime Fitness - Highlands. Anytime Fitness in Denver CO is a health club that offers personal training, 24 hour fitness access, and a staff with extensive knowledge in training and fitness! As one of the cheaper gym options in Aurora / Denver area, we make it easy to have all the amenities of the best gyms in the boulder area at a fraction of the cost. Whether you are looking for a powerlifting gym in Denver co or just a local personal trainer, Anytime Fitness is the top gym choice.