Manhattan is also perfect for this. You can walk anywhere and it's great exercise and if you need to get anywhere far, the subway is usually 2 or 3 blocks away at most. I could never figure out how so many taxis could exist in such a walkable environment until my coworker took a taxi to go 3 blocks. People love to be lazy, especially when the company is footing the bill. I still don't get why we don't have a light rail system to complement the subway system.