I'm driving my dad's old 2007 Prius. It's still getting 40+ mpg and is probably going to hit 280,000 miles this week.
I'm very tempted to move closer to work (currently commuting 30 mins each way) and just ditch having a car once this one eventually dies. Between the commute, maintenance, insurance, and paying $200/month for a parking spot in my building, cars are money/time pits, to say nothing of the environmental impact.
I do go hiking a lot, especially in the summer, but even so I'm sure that renting a car for a day even every weekend is going to be cheaper.