Thermal Spa Question

[FaithPlus1]

This is for the Jewel but any NCL ship (not sure if this would range per ship). 

 

I saw on a daily that on 1 night from 7-10 there was a "lady's night in thermal spa". I know there is a fee for this, however how is this any different from any other time in the spa since the spa is open until 10 anyway???

[ohiocruisemom]

The Spa on the Jewel is set up completely differently than on the newer ships.  Almost all amenities are split Male and Female with only a few stone loungers and a small therapy pool being shared.  I do not know about the "Ladies Night"