Inside Element Fitness, the lime-green walls of the cardio room energize guests dashing away on treadmills as the yoga studio’s crisp white walls and glowing orb lights soothe yogis. The pool room echoes with splashing as guests stretch during pool aerobics classes; the dry sauna nearby remains quiet, letting guests absorb dry heat without listening to the heavy-metal albums played in traditional saunas. Stationary bikes adorn the spinning studio. Meanwhile, in workout studios lined with free weights, personal trainers make use of their professional weightlifting or triathlon experience during one-on-one personal-training sessions or group fitness classes.