Well, my idea for my crazy century? Pack the road bike and fixed gear into my car. Head over to the local college campus. There is a 1 mile loop that has one stop sign and is 99% unused bike lane. Park the car right on the loop. Bring a nice lunch/snacks/water/whatever and ride completely stripped of anything on the bike. No cages, no bag, no spare tube kit, nothing other than a rear light and a computer. Monotonous? Absolutely. Bathrooms are close. Could swap bikes out if I wanted to change it up. No worries about a flat tire or mechanical failure. Was just gonna ride, and ride rather fast if possible. If it became too boring, you just head out a bit further if needed.