disreputable or sordid in a rakish or appealing way
One can read about it in those louche tomes
a louche, chain-smoking Lebanese in a safari pantsuit
he was named as one of the louche uncles
When a man walks aimlessly and for pleasure he is called a flaneur; a certain louche glamour attaches to the word.
listening to a louche character with a thick moustache
The louche Playboy rubs elbows with the staid Time.
The boundaries he pushes are only partly for our benefit; his chameleon love affair with the frisson of the louche
His current self was considerably more louche
in an atmosphere of louche decadence, the business and cultural elite linger like models or gawp like voyeurs as they stand around a swimming pool