Melbourne Spas that allow nudity?

Hi guys,
I was wondering if anyone knows of any spas in Melbourne that allow nudity?

For example, I've been looking into Crown's 'Aqua Retreat' area which is segregated into Men's and Women's areas, so I'd assume there'd be some level of nudity allowed there, but it's not expressly stated.

I'm aware of both the Japanese Baths (Collingwood and City) but not really aware of any other places that might be ok with total nudity.