I'm heading to L.A. for work next week and trying to decide where to stay.  I want the option of entertaining a nice young (or mature - I haven't decided yet lol!) lady and wonder if anyone out there has any recommendations for hotels that would be nice but discreet.  The last place I stayed in West Hollywood was very nice, upscale, etc., but they required that any visitors be announced.  Meaning, I couldn't invite anyone up without the hotel desk knowing or actually coming down to meet the person.  Kind of inconvenient!  

Does anyone out there have a good "hobbying" hotel recommendation?  I can spend $350/night or less.

Thanks!

Though I live in LA, I personally like the Viceroy, in Santa Monica when neither party could host. It's range is a bit higher then you are quoting, but if you keep watch, you can catch a better rate there once in a while.
The Chamberlain in West Hollywood is a real nice, quite place too, and is in your price range, with a few dollars in your pocket to spare. Forgot what the door policy is for guests though.

Four Seasons Hotel,  Westlake Village.

I know the Four Seasons is also a good one.  I also like L'Ermitage and the SLS Hotel (which has The Bazaar downstairs - fantastic restaurant!).

Have fun!