Starbuck’s
A coffeehouse doesn’t conquer the world without doing something right, and Starbuck’s does offer a consistently good product. The people who invented or at least renamed and popularized several cold coffee drinks offer something for every weather, and once you find something you particularly like you know you can get it anywhere. Even people who don’t love Starbucks admire them – they brought coffee culture to the masses and still do a fine job of it.
Starbuck’s: Everywhere
Runner-up: Peet’s, Not quite everywhere