Stay away from Classificadosx website. Some cheap offers, true, but 80% of images are fake.
Sousexy.pt is ok, all pics are true because they take them for the girls, otherwise they can't get on the website. Also with apartadox.com, all real pics, it's the most expensive site for the girls to advertise.
Don't go for outcalls from websites like vivalocal or rua69, might be the biggest disappointment, also, there are some ladies that come, want you to pay because their boss is waiting for the money outside the hotel or house and they need to tell them they're ok....and younever see them again.
If you have a car, try a drive up to Santarem, Kikas Bar.
AND...be aware that lots of the Brazilians had their surgeries in Brazil...and those surgeons do a real good job with changing a boy into a girl!!!
Living in Lisbon since 8 months, done this and that, so hope this helps a bit.
Happy hunting
Almost forgot:
Visiting certain ladies that ask for 100€/h it might be worth not mentioning being a tourist...but telling that one just moved to Lisbon...might drop the rate to a 60€