Have been looking for a good spa/massage center w/ HE myself.
There are very good ones in south china where you get great facilities, good looking girls, an actual decent massage, and finally the special "butt massage" (tui gu in chinese) + HE. Great for a lazy and relaxing day out.
Haven't found something similar in Shanghai. Anybody got any input here? Will try out JB massage when I have the chance, and put a review up. The closest I've gotten is a massage call girl center. You call up the number and they dispatch a girl to your hotel/home. Girls are ok, massage is sometimes decent, and the "butt massage" and HE is not bad.
Not sure about board rules and whether I can post the url. I don't frequent these forums too much, but will respond to PM's when I do come back.