Thursday, July 18
BEACH VOLLEYBALL, coed games, Gurney’s Inn, Montauk, from 6 p.m.
Saturday, July 20
TENNIS, Pro-Am tournament to benefit the Retreat, Hampton Racquet Club, Buckskill Road, East Hampton, 4-6 p.m.
POLO, opening day, Two Trees Stables, Hayground Road, Bridgehampton, 4 p.m.
Sunday, July 21
TRIATHLON, Montauk Sprint, one-half mile swim, 14-mile bike, and 5K trail run to the lighthouse, East Lake Drive, 7 a.m.