If you want somewhere a little less risky for pulling a SP then try Blue Star 69 Carrer Numancia. Closest metro station is Sants and walk up the main road for 10 minutes. Blue Star has a sex shop on street level and sex cinema underneath with a girl or two offering their services in limited English. Two visits have been successful and had company both times, the first time I was stung for €50 for FS with OW, second visit I blagged it down to €30 by claiming that was all I had on me, again OW/FS but also RO.