The water is normally kept at room temperature, but chilled water is also used. The grounds are filtered out of the water after they have been steeped using a paper coffee filter, a fine metal sieve, a French press, or felt, in the case of the "Toddy" brewing system. The result is a coffee concentrate that is diluted with water or milk, and is served hot, over ice, or blended with ice and other ingredients such as chocolate.
A coffee percolator is a type of pot used to brew coffee by continually cycling the boiling or nearly-boiling brew through the grounds using gravity until the required strength is reached. There are stove-top percolators and standalone units which contain a built-in heating element. Percolators were popular until the 1970s, when they were widely replaced by drip coffee makers. By the mid-1970s, many companies ceased production of percolators.
I don’t have a problem with people adding things to their coffee (my wife enjoys her coffee with cream and minimal disapproving head shakes from me) but I do think black coffee has its merits. It is my opinion that the vast majority of coffee additives are remnants from the first wave coffee notion that coffee is vile, caffeine is good and adding things to coffee makes it tolerable.
Drinking coffee with sugar increases your diabetes risk, especially type 2 diabetes. Some studies have found that people who drink black coffee without sugar have a 23 to 50 per cent lower risk of getting this disease  ,  ,  . Diabetic people should also avoid sugar-laden coffee as they cannot secrete enough insulin, and drinking coffee with sugar causes the sugar to accumulate in the blood.
Hammerhead: A coffee drink only served in the USA. It is an American term for a shot of espresso in a coffee cup that is topped up with drip-filtered coffee. As Kris Rosvold explains in the comments: In Oregon, the hammerhead is usually known as a red eye and uses 2 shots of espresso topped up in a 16oz travel mug with drip coffee. It's also sometimes called a "shot in the dark".
While the health benefits of coffee are still a debated topic; it is a generally accepted fact that a cup of black coffee is an insignificant calorie contribution. It isn’t a diet buster. Adding cream or sugar (the verdict is already in on how bad sugar is for you by-the-way) to your coffee takes a neutral (possibly healthy) drink and turns it into something with calories and thus something that should be evaluated. Drinking two to three cups of black coffee a day is not usually considered to be a problem, however, drinking two to three cups of a milky, sugary coffee drink a day is a habit most would consider unhealthy.
Increasing age leads to decreased cognitive skills and increased risk of Dementia, Parkinson’s and Alzheimer’s disease. Having black coffee in the morning enhances the brain function. Black coffee helps the brain to stay active and thus helps in boosting the memory power. It also keeps the nerves active which in turn keeps dementia at bay. Studies say regular consumption of black coffee reduces risk of Alzheimer’s by 65 per cent and Parkinson’s by 60 per cent.