My experience is "Non Sexual Service" on the DB means HJ. If it was a place which really didn't even offer HJ, they probably wouldn't post on the DB. Out of about 10 experiences at AMPs on HK Island, one time I was given BBBJ as part of the ending part, but the actual finish was with hand. However, I've never asked for FS either.
Based on what I've read on this forum, a lot of guys go to Nuru Spa in TST which offers FS, on the DB it's listed as "Non Sexual Service".
My general advice would be that if you want FS, you should go for 141 or Hotel Girls. Unless you see a report on an AMP which said FS was on offer, it's unlikely (on the HK side, at least) to randomly walk into an AMP which have girls who offers it. In addition, these girls who do offer tend to negotiate like crazy mid session (killing the mood) and you end up paying more than 141 and equivalent to HG.
rosebud888's recent post sums this up:
http://forum.sex141.com/eforum/v ... ;highlight=cochrane
In summary, "Non Sexual Service" means at least HJ (as long as you don't look like a cop, like twiceAweek said).