Praia de Pinhão may have attracted nudists at one time but these days the Maritme Police are doing more patrolling of the Lagos beaches and decorum seems to have been the watchword this summer.
One never knows, however, the odd nudist may still make it there. Personally, I don't see the problem as long as they act naturally and don't make an exhibition of themselves.
As to the location of the fire station, follow the Avenida out of town past the Fort, (fortaleza), (to your right,) continue up the hill and you will come to the Fire Station on your right. The access for Praia de Pinhão is to your right.
