Beware of asking for or being offered simply 'coffee'. Luckily a lot of restaurants invest in drip machines, so restaurant coffee is usually the same as what you're used to. And Coffeemate seems to be available everywhere. Along the same line, iced tea is unheard-of here. If you order 'tea', you'll definitely get the hot variety.
Alcohol consumption is extremely common.
Some people do choose not to drink, but they are more unusual than those who do. One local favorite here is a food called Yorkshire pudding. Puddings in general are very different from the U.S. variety. Pudding here is usually a cooked, sweet dish, with a cake-like texture. What we're used to calling pudding is commonly referred to as 'Whip'.