Walk out of the Hilton, and take a left down the alley... you pass a few massage shops.. go to the next street, take a left, and walk about a 1/2 block.. you will see the Shanghai hotel..
Enter the lobby, to the left is the elevators.. 2nd floor.
Get off, and the reception for the spa is there... Pick the 600 rmb option...
Go in, shower, move on to next area, pick your girl, go to the private room, with the red roping hanging above the bed.... fire and ice massage.. etc etc...
If you want a decent massage and just a HJ, accross from the Hilton, to the right about 1/2 block is a massage place... Brightly lit, you go in and there is a girl there... (she will be your girl, unless you want another).. down stairs... dark rooms separated by dividers... not too nice, but usually a decent massage.. HJ offered... (you negotiate....) cheap...