There are a few decent erotic massage studios in Hamburg. For such a large city the amount of sensual massages salons is rather modest. Probably they are being pushed back by brothels and FKK sauna clubs, which offer so much more than just a massage.
Rue Ciel (http://winterhude.rueciel.de/) at Himmelstraße 44 is an all right place with good service and so is Felicitas Wellness (http://www.felicitas-wellness.de/), located at Borgfelder Allee 3. Both are great places to relax alongside a professional masseuse from Asia or Eastern Europe for €50 per hour.