If you are new to exercise or haven't exercised for years, it might be helpful to have someone advise you on what type of exercise would be best for you. The person can suggest classes you could take that you would enjoy and are at the appropriate level for you. He or she can also advise you on weight training and using the cardiovascular equipment. You want to make sure the classes that appeal to you are convenient to your busy schedule. If you don't like those that are scheduled for your free times, you won't go, and that means less value for your dollar.
Variety can improve adherence to an exercise program in the long run.
Make sure the facility offers programs that you are excited about.