It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "The worst house is the hammam (bath-house), in which voices are raised and private parts are uncovered." A man said: "O Messenger of Allah! In it the sick are treated and dirt is removed." The Messenger of Allah (peace and blessings be upon him) said: "Then whoever enters it should not enter it without covering himself."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 10880