'white chair" ladies in Spain usually have a more discrete spot to do the deed - usually in your car or theirs and they will have you drive up to half a mile to their secluded spot. You will usually see these ladies by the junction to a narrow road/track - that's not a coincindence.
Occasionally they will have an old sofa behind the trees - I recommend doggy in those cases!
We aren't talking of an hour and a half passion here just a quick BJ or pump and dump and at 20Euros for a covered BJ you cant really expect much