Welcome to the forum !
nope, no key words !
you need to test your luck at these massage / foot massage places you mentioned or
if you want to be sure to get a happy ending suggest you try the FS saunas mentioned in the sauna section.
Read through the reports there and you will get a better understanding of what's in store for you !
For a newbie in saunas ... maybe you should try Blue Sky on HK side and Noble on Kowloon side.
HGave fun and report back !