Hours of operation - You can inquire about the hours of operation and choose the time slot that is suitable for you. Some gyms operate round the clock while a few others have specific timings. It can be a good idea to visit the gym during your preferred time slot to check the crowd there. When you go to the gym, check the ventilation and other amenities. Most of the gyms have snack or juice bar, steam bath, sauna, personal trainers, and audio-television facility.