yes there is a charge. daily, or length of cruise. it is adult only
it is a quiet area within the Spa. couple of heated tile loungers, a dry sauna, a steamroom, showers. very low lighting, extrs soft background music. nice place top relax and get some reading in.
really only worth paying for a length of cruise pass if you intend to actually use it every day.
Back when they had the romance package it was part of it. we used it maybe 3 times on our 7 day cruise. we enjoyed it greatly but unless it was included in a package( sometimes after a spa treatment they let you use it too) I wouldn't pay the prices listed.