"Madness Under the Moon," an evening of dinner and dancing honoring esteemed designers Bunny Williams and John Rosselli, will be held Aug. 20 at the Hollister House Garden in Washington.

Supported by a benefit committee composed of local luminaries in the arts, fashion, horticulture and design, including Oscar and Annette de la Renta, Carolyne Roehme, Robert Couturier, Philip Gorrivan, Peter Wooster and Kathy Root, the evening's hosts are Hollister House Garden's creator George Schoellkopf and special advisor Gerald Incandela.

The event, which began as a garden party many years ago to foster the development of Hollister House Garden as a horticultural resource for the area, has evolved this year to a gala with dining, dancing and live music with the Brazilian trio Tres during cocktails and a disc jockey after dinner.

Tickets are $150 for members and $175 for nonmembers and may be purchased at www.hollisterhousegarden.org or by calling 860-868-2200.