I agree with Jordi: What a question! There are many beautiful women in Madrid and any city in Spain but you are likely to find that they are a little less "liberal" than you seem to want. I have noticed that the women keep more to themselves and to Spaniards than the men. But if you're travelling here there are plenty of foreigners (Americans, Germans, Swedes) who love to party and dance and are a little more open to involving themselves with anyone. If you can drop certain expectations, you will have great time no matter what. Have a great time!