We had this happen a few years ago. We both had carry on bags so at the recommendation of a local flight attendant, grabbed a cab to El San Juan Hotel, Curio Collection by Hilton for a great lunch on the beach. The bellhop was more than happy to check our bags for a few hours. It was a great way to end the trip. We got super lucky too as the cab driver who too us there just gave cab rides for fun...aka tips. Super nice guy who swung back and got us back to the airport too.