In sports, many modern balls are pressurized. Some are pressurized at the factory (e.g. tennis, squash (sport)) and others are pressurized by users (e.g. volleyball, basketball, football). Almost all pressurized balls gradually leak air.[from wikipedia]

Dance hall in its general meaning is a hall for dancing, but usually refers to a specific type of twentieth-century venue, with dance clubs (nightclubs) becoming more popular towards the end of the century.[from wikipedia]

A grove is a small group of trees with minimal or no undergrowth, such as a sequoia grove, or a small orchard planted for the cultivation of fruits or nuts. Other words for groups of trees include woodland, woodlot, thicket, and stand.[from wikipedia]