every, I mean EVERY, building in Thailand has its security guard(s). This is Mona Lisa's. He was kind enough to explain what goes in behind the polka dotted wall: bathing and masage. That, in Thailand, is a bit of a euphemism. Yes, the girls here will bathe and massage you but they're available for anything else that crosses your mind. One tourist who thought I'd taken his picture hovered silently, paranoid but shameful, around me for a few minutes. I think he had taken the euphemism to its limit.