The big one for me is Citi Bike, and Lyft which require them to work. But it's only while using the app. Otherwise I actually have location services turned off for almost everything and try to just use a zipcode instead.

With Maps I enjoy not using location services because I end up knowing wherever I am better. It's a bit of a pain sometimes to try to figure out where in a city you are based on some street signs but it's really neat when you can talk about a whole neighborhood before the friends you're visiting can!