Don't know the parlour, but recognise the girl pictured in the advert,
you will see her, or atleast her picture at Independent Babes in Slough, independentbabes.co.uk , by the name Christy
and also at Massage Northampton, where she is Laura, massage-northampton.co.uk
Not sure if the above is helpful, but you can check and see if the same girl is down to work at 2 or 3 venues on the same day, which might raise your suspicions.
I have never visited her, but have occasionally thought about it.