Season brings endless fitness options. The Well pops up at Dune Deck Beach Club for classes, eastern and western healing practices and spa services galore including Dr. Barbara Sturm facials. Water Mill workout queen Tracy Anderson opens her Sag Harbor studio July 1, while DanceBody’s Wainscott pop up offers adult, kids and private classes. 379 Dune Road, Westhampton Beach, N.Y., 11978. One Bay Street, Sag Harbor, N.Y., 11963. 352 Montauk Highway, Wainscott, N.Y., 11975