Shiatsu is definitely a good way to go...
I actually got a really good massage complete with back walking at one of those dirty asian whore massage parlors once, tip 15-20% depending on how good it was.
If you want some cheap massages with generally young nervous chicks
look up the local massage school because they have to do like 100 hours of massage for free before they can be certified and work professionally. You can get 'em for free or for a pretty deep discount at those schools, but they obviously aren't as experienced there.