Yes if you want to learn polo rather than watch it — this is the only East End barn that will put a true beginner on a polo pony, and it is around the corner from the Hampton Classic showgrounds. Only if you call first: nothing is published and Wednesdays are closed.
The on-ramp for adults who want to actually ride chukkers. Gray Horse Farm Hamptons — founded 2001, led by Erin Stewart and Lauren Gridley — is the riding operation now working out of the Two Trees farm on Hayground Road, 115 acres with three outdoor rings, two indoor rings, a Grand Prix field and a polo field. Its owner-trainer offers beginner polo lessons; horses and ponies are available for lesson, lease or sale. (Two Trees Stables itself, the boarding business, is marked temporarily closed and its own domain no longer resolves — the polo lessons here are Gray Horse Farm's.)