Dictionary.com/louche:

louche (LOOSH) adjective

Of questionable taste or morality; decadent: “The rebuilt [Moscow hotel] is home to the flashy, louche Western disco Manhattan Express” (Liesl Schillinger).

Source: The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2000 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

---

adj : of questionable taste or morality; “a louche nightclub”; “a louche painting” [syn: shady]

Source: WordNet ® 2.0, © 2003 Princeton University