Red - light districts are areas associated with the sex industry and sex-oriented businesses In . Spain. Brothels are illegal (since ), but "clubs" and " wiskerias" are fronts for prostitution and are tolerated. See also: Prostitution in Spain · Barcelona. It is hard to provide a complete guide of all the pleasures that one could experience in Barcelona. The city does not have a Red Light District. Walk through Barcelona's Red Light District – Barcelona has a red light district? Well, not exactly, but just west of La Rambla is the area it would.