There are many variations of the game of croquet. The New York Croquet Club primarily plays competitive versions of croquet: American 6-Wicket (USCA), Golf Croquet and occasionally Association (International).
Casual Croquet - Long Grass Rules
The NYCC doesn't normally play Long Grass Rules but there will be 9 Wicket (9W) Long Grass Rules play in special mini-tournaments.
RULES: BACKYARD 9-WICKET