Dunkin' Spiked Coffee is a boozy take on the donut chain's popular coffee drink lineup. Here's the alcohol Dunkin' uses in these sweet beverages.

Dunkin' on Tap might sound mysterious, but fans of the coffee and donuts chain will know that it's just their name for an increasingly popular variety of drink.

From Peet's dark roast perfection to Biggby's playful flavors, here's a ranking of popular coffee chains, perfect for every ...