There is no such thing. There ar massage parlors and there is tantric yoga, but the two are very different things and are found in totally different settings. A massage parlor is involved with prostitution and tantric yoga is used for the develpment of health and consciousness.

dualist vs non-dualist

Chen-chi Chang has written:

'Teachings of Tibetan yoga' -- subject(s): Tantric Buddhism, Yoga

'The practice of Zen' -- subject(s): Zen Buddhism

Knowlege which tends to be secretive, obscure, available to the few initiated--

Examples--Gnostic Christianity, Kabbalism, Wicca, secret societies such as the Masons and Rosicrucians, Tantric yoga....

David Frawley has written:

'Yoga for Your Type' -- subject(s): Ayurvedic Medicine, Hatha yoga

'Yoga & Ayurveda Book'

'Herbal Energetics Chart 9\\'

'NETI'

'Yoga and the Sacred Fire'

'The Rig Veda and the history of India' -- subject(s): Criticism, interpretation, History, Vedas

'Tantric Yoga and the Wisdom Goddesses'

'The astrology of seers' -- subject(s): Hindu astrology

'Yoga'

'Beyond the mind' -- subject(s): Intellect, Spirituality, Thought and thinking