Guo hai sui dao (1999)

Some people are having fun in Hong Kong tonight. A curious yet nervous middle-class couple ventures into a love motel and experiments with alternative practices for the first time; a new triad recruit on his first delivery job overhears a highly emotional exchange between two cops in a public bathroom; a drunken dude finds the keys to an empty apartment and mistakenly falls in love with its absent owner; and a Filipino maid runs all around town only to get caught in a doomed love triangle.