Named after original owner Mary Katherine, Mar-Kays Wine & Liquor has served the Port Jefferson community since the '70s. This store has a wide selction of liquors, a temperature-controlled cellar for premium wines and over 300 imported and domestic labels. Mar-Kay also offers a wine club that allows customers to try wines at discounted prices. Emails are also sent out with updates on the latest bargains. Senior discounts are available, and competitors' coupons are accepted. Mar-Kays can be found in a strip mall on the westbound side of Route 347.