I do what others have said--commuting sometimes, and night riding sometimes:

I'm a teacher, so have the summer off; however, here in Phoenix, it means getting up even earlier than I do to go to work! I usually try to hit the road before 5:30 am. When I go back to work, I'll sometimes get up at 2 or 3 a.m. to ride with the lights. It's an amazing experience, with the roads quiet and the lights of the city almost seem magical. You feel like you own the city! I live near enough to the desert that after a few miles, I can hear the coyotes. If you've never lived in the desert, you should know that it is still 85-90 degrees in the wee hours of the morning. However, I rarely ride at night during the winter! I'm a real wimp, and 40 degrees is just too cold when you add the bike's wind chill factor. That's when I try to get out and run a few miles. We also have an exercise bike in the living room, but I rarely use it because it's a recumbent and employs different muscles and makes me sore.