A golf course comprises a series of holes, each consisting of a teeing ground, a fairway, the rough and other hazards, and a green with a flagstick ("pin") and hole ("cup"), all designed for the game of golf. A standard round of golf consists of playing eighteen holes, and most golf courses therefore have this number of holes. Some, however, only have nine holes, and the course is played twice per round. Other courses have twenty-seven or thirty-six holes and players choose two groups of nine holes each, providing novelty, and also for maintenance reasons. Additionally, par-3 courses also exist, consisting of nine or eighteen holes, all of which are par 3 (the number of strokes considered standard for a scratch golfer). Many older golf courses, often coastal, are golf links, which are a different style from the others. Non-municipal courses usually include a golf club based at the course, which generally provides a pro shop.