As the sign says, "Strictly casual." Bahåke is the Chamorro term for the most casual clothing possible, usually reserved for in and around the house. Take for example these two lalåhe :
The guy on the left : casual. Good enough even for church (weekday Mass) or many types of employment.
The guy on the right : BAHÅKE!
Bahåke is the type of clothing that a young man runs and changes in the bedroom when he sees the girl he is flirting with approaching the house.
Bahåke is the old but comfy gown a woman would never be caught dead in outside the immediate family.
The word was adopted by the Chamorros from the Spaniards by way of the Filipinos. The original, Tagalog word is "bahag." It means "loincloth," as seen below. The bahag was worn by many Filipinos before the Spaniards came, but since then it is mainly the mountain tribesmen that wear it.
A modern-dressed Filipino modeling the "bahag" loincloth