I have one bike which I use for going to work, grocery shopping, riding around town and running errands; I use this bike on a daily basis for purely utilitarian purposes. I also have a road bike for fun/fitness; I usually try to do a 2 rides on the road bike per week (in addition to running and other sports). But since I enjoy all of these activities (even the errands) and they all have health benefits, then maybe everything is for fitness and fun.