I think nothing beats riding a bike. It's not only great exercise, it's so much fun. I like to bike and sing (horribly off key, but whatever), bike and talk, bike and observe, and just plain old bike. I had a wonderful time biking and getting to know people at the last Critical Mass bike ride in Springfield. I had a great time biking south and west and back east tonight; it was my first biking at night experience, and it kicked ass. I think I biked about 9 miles altogether. I love riding a bike. I hope winter doesn't come for a while.