Nature Girl,
Failte.
I have been a master practitioner for some 5 years now and have never worked in a "Spa"-type setting.
All my treatments have been given at my home or that of my "client". I have never experienced any issues with boundaries in either setting. I tend to give treatments in my lounge, which is quiet and peacefull and induces a sense of well-being in my "clients".
Hope this helps a little.
Beannacht leat
Brian