WINNERS’ CIRCLE: Heiress Joan Irvine Smith (B1)...

WINNERS’ CIRCLE: Heiress Joan Irvine Smith (B1) is about to merge her philanthropy and her love of horses. . . . She says this June’s annual horse show on her San Juan Capistrano ranch will air on a national sports channel. She promises to arrange five minutes of free time on the telecast for organizations promoting water conservation, saving the rain forests and protecting the ozone layer. . . . Also on tap in September: a second horsey gala to raise funds for UCI Medical Center.