Sayyiduna Abdullah bin Amr (may Allah be pleased with them both) says that the Messenger of Allah (peace and blessings be upon him) said: "The land of the non-Arabs will be conquered, and you will find there houses called bathhouses. Men should enter them wearing a waist-wrapper, and forbid the women; only one who is sick or in postnatal bleeding (nifas) may enter."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب القسم والنشوز / 14804