Right now I have one bike that does both, a Giant hybrid that has taken me on many metric centuries and has been my commuter since September. Six months of riding in traffic in all kinds of weather, though, has convinced me to get a dedicated commuter. I want hub based brakes for all-weather riding, a dyno hub, and a step-through frame. My new bike should arrive in about a week. When it does, I'll restore my hybrid to its pre-fender days and use it for longer, faster recreational rides.