Sassafras root is still used to flavor traditional root beer, although since sassafras was banned by the U.S. Food and Drug Administration because of the carcinogenicity of its constituent safrole, most commercial recipes do not contain sassafras. Some commercial root beers do use a safrole-free sassafras extract.
There are usually 18 holes in a golf course; some have 9 holes or some multiplier of 9 holes. I have played at golf clubs with 9, 18, 27 and 36 holes. However, a standard round of golf at most golf clubs / courses involves 18 holes.
Types of Courses. A full par-72 course will take approximately four hours to play, but a par-3 course with 18 holes can be completed in around two hours. Good players who shoot at or around par can expect to finish 18 holes with a foursome in as fast as three hours, even walking.