If you are only going to sunbathe and enjoy the beach and nightlife, almost not necessary or bicycle, although it is recommended. if desired, go for island tours, you can rent and go from white beach or if desired independence no car rentals both at the airport and Playa Blanca. Ferry to Fuerteventura is in the same port of this town, which reduced cost and can be crossed by car and walk or bike the neighboring island too. I recommend the vehicle only because it's punishing see natural landscapes, etc.