Barcelona - Prostitutes and brothels: tips and recommendations (My experience)

If you are planning a trip to Barcelona and you want to have a good time with a girl, here are some tips: -Avoid the Nigerian prostitutes on the Ramblas, they are part of a gang and they will try to mug you. -If you go to clubs, don't trust extremely attractive women who will insist you buy them drinks and ask you to go home with them. -Avoid the area near Nou Camp, it's mainly transsexuals. -From personal experience, you can ask locals for brothels to visit. It's always a good option.
When I travel to Barcelona I visit a couple of local chatrooms, if you know a bit of Spanish you won't have problems. You can ask about clean brothels there. In Barcelona most people can answer in English. Don't be afraid to ask the taxi drivers or hotel staff.
If anyone has any other advice, please contribute!