The Fitness Center at JW Marriott Chicago

"The Loop location is convenient for business travelers, and the pool and 24-four fitness center is top-notch"

"The pool is part of a sprawling fitness center that also has cardio studios and high-tech stationary bikes synched to rides on video screens"

""Contemporary meets traditional" at this upscale, business-focused chain outlet in a renovated historic Daniel Burnham building featuring marble bathrooms with “excellent” stand-alone tubs and west-facing digs that look onto Willis Tower (upgrade to the executive floor for oversized rooms and access to a lounge with breakfast and free WiFi); pluses are “attentive and professional” staffers, a spa and fitness center with a “range of different cardio options, weights and machines”, and a financial district location that's “close and convenient to Downtown business” -- just know that the “area completely clears out on weekends"

"The gym provides both cardio and circuit training, using mostly Life Fitness equipment"