So we live in TOC (the residential side of JW Marriott) and consider Cava 15 our "neighborhood bar", though it used to also be very popular with hotel guests. The staff is incredible - the bartenders will take the best care of you and remember your favorite drink after one visit. Some of them have worked at the JW for many years, and they all have excellent English. The manager Jeanette is the gold standard for hospitality. However, recent design changes like hanging heavy dark curtains across the entrance make it uninviting and looks like a bordello. They also replaced the bar tv with a mirror! Honestly it's a Marriott, who pulls the convivial atmosphere of watching sports so you can stare at yourself in a mirror? Come for the great service and drinks, but please let the hotel know what you think of the atmosphere.