Acutally, idea of bath houses is very ancient... even before
Jesus Christ was born, already exist. Back then, bath houses are
popular because not everyone has a bathroom at home.
If you really want to set this up, you need to seperate the
bathhouse into two sides, one side is female only and the other
side is male only.
But, nowadays, I dont see why need to go these bath houses when
you can just get a shower right at home. Unless you have some
value-added services, unlikely to survive as a business.
