If you just go for the view when gyming, this hotel would be your choice. Other than that, I wouldn’t choose this Sheraton for long-term stay if you wish to workout.
Gym only has very few dumbbells, no barbells, one multi-function machine and cardio machines. Hotel does have a swimming pool, but it is in front of the penthouse -bar, so not really ideal for anything else besides drinking gin tonics while floating around.