I like to exercise in the morning before going to work. But here in Switzerland the health club we belong to does not open until 8 am. In San Francisco they all seemed to open at 5:30 - if they were not open 24-hours. But it is nice, I share the gym with people over 65! The best part is that the gym has musak - often rap or hip-hop - and I am sure the retirees would die if they knew what the words meant.