I would tend to think that if they had a Facebook page then they are probably a legit massage, as opposed to a "brothel barely disguised as a massage parlour" type of place. The fact too that all their photos are either soft focus of ornaments or their premises, then it doesn't look seedy enough to be a HE type of place.
I'm interested too though as I'd love to find some places I could pop to (for a pop I guess) on a lunch time without going the whole hog of an escort booking.
Cheers,
KV